Wicked Messenger
Creature - Human Scout
When ~ dies, target opponent pays any amount of life. You may search your library for a card with converted mana cost greater than or equal to the amount of life paid this way and put it into your hand. If you do, shuffle your library.
1/3
There was a wicked messenger, from Eli he did come...

Growth Charm
Instant
Choose one:
-Put 3 1/1 green saproling creature tokens onto the battlefield.
-Put a +1/+1 counter on each creature you control
-Gain life equal to the total power among creatures you control.

Order Charm
Instant
Choose one:
-Put target creature on top of its owner's library.
-Draw two cards and gain 2 life.
-Exile target noncreature spell.

Scheming Charm
Instant
Choose one:
-Creatures get -2/-2 until end of turn.
-Target player puts two cards from their hand on top of their library.
-Counter target creature spell.

Psychopathy Charm
Instant
Choose one:
-Psychopathy Charm deals 4 damage to target creature or player and 4 damage to you.
-Creatures you control get +2/+0 and gain lifelink until end of turn.
-Exile the top three cards of your library and you lose 3 life. You may play those cards until the beginning of your next end step.

Primal Charm
Instant
Choose one:
-Put a 3/3 green beast creature token onto the battlefield. It gains haste until end of turn.
-Put 3 +1/+1 counters on target creature.
-Each creature you control deals damage equal to its power to target creature.

Unbreakable Will
Instant
Until end of turn, creatures you control are indestructible and damage can't reduce your life total below 1.

More 4cmc charms:

Frenetic Charm
Instant
Choose one:
-Exile target spell. Its owner may cast it this turn.
-Frenetic Charm deals 2 damage to target creature or player. Draw a card.
-Put a token onto the battlefield that's a copy of target permanent. Exile it at the beginning of your next end step.

Oasis Charm
Instant
Choose one:
-Until end of turn, each creature target player controls loses all abilities and becomes a green elephant with base power and toughness 3/3.
-Search your library for a creature card, reveal it, and put it into your hand, then shuffle your library.
-Gain control of target land.

Fungal Charm
Instant
Choose one:
-Target opponent sacrifices a creature, and you put a 1/1 green saproling creature token onto the battlefield.
-Return up to two target creature cards from your graveyard to your hand.
-Regenerate each creature you control. Those creatures gain deathtouch until end of turn.

Sanctimony Charm
Choose one:
-Destroy target tapped or blocking creature.
-Return target creature card with converted mana cost 4 or less from a graveyard to the battlefield.
-Target player loses 3 life and you gain 3 life.

Justice Charm
Instant
Choose one:
-Put a 1/1 white soldier creature token onto the battlefield for each creature target player controls.
-Creatures you control get +1/+1 and gain menace until end of turn.
-Destroy target artifact or enchantment.

Voltaic Channeler
Creature - Human Druid
You may spend energy counters as though they were mana of any color.
: You get an energy counter.
2/2

Aether Furnace
Artifact
Sacrifice a permanent: you get an energy counter.

Conjure Ball Lightning
Enchantment
At the beginning of combat on your turn, put a 6/1 red elemental creature with trample and haste onto the battlefield. Sacrifice that token at the beginning of the next end step.

Renegade Saboteur
Creature - Human Rogue
When ~ enters the battlefield, you get 3 energy counters.
, pay 3 energy counters: Destroy target artifact.
2/2

Song of Dominia
Sorcery
Convoke
Untap each creature you control. Until end of turn, those creatures gain trample and get +1/+1 for each color among creatures you control.

i very very rarely like 5C designs but this is good in my opinion

Thanks.

Mystic Bulwark
Instant
Put X 1/4 blue and white wall creature tokens with flying and defender onto the battlefield.

Seems underwhelming, like a really bad fog. I'm not sure gumming up the board with piles of flying walls is something that results in fun gameplay.

Yeah it's probably underpowered, but I don't think it's unfun. Remember, different people have different ideas of what's fun than you do.

Isn't unfun and underpowered the right combination?

Doesn't seem underpowered enough. Should be a sorcery

Looks like a fun card for me... Not like it will stomp all aggro decks.
Compare to new WotC "expertise" card...

Permanent Revolution
Enchantment
Permanents don't untap during their controllers' untap steps.
At the beginning of each upkeep, untap all tapped permanents, and tap all untapped permanents. Then, turn all face down creatures face up, and all face up creatures face down.

Miasmic Cloud
Instant
Choose one:
-Target creature gets -3/-3 until end of turn.
-Each creature your opponents control gets -1/-1 until end of turn.

Surge of Strength
Instant
Choose one:
-Target creature gets +3/+3 until end of turn.
-Each creature you control gets +1/+1 until end of turn.

Glorious Charge effects have been traditionally white, and pumping power by 3+ is traditionally green, so it's hard to do this card as monocolored, but if I do it multi, it's a **** Sigil Blessing. Therefore, I have to choose between breaking the white pie for the first ability, or the green pie for the second. Or I could just make it another color altogether, that can do both targeted and mass pump:

Seething Rage
Instant
Choose one:
-Target creature gets +3/+0 and gains first strike until end of turn.
-Creatures you control get +1/+0 and gain first strike until end of turn.

So I designed a cycle of allied hybrid commons for SJT's Atlazan contest, and thought I'd finish the cycle with enemy colored ones:

Sulfur Snapper
Creature - Turtle
: ~ gets +1/-1 until end of turn.
: ~ gains first strike until end of turn.
1/4

Nebulous Seastinger
Creature - Jellyfish
: Return ~ to its owner's hand.
: ~ Must be blocked this turn if able.
1/2

Ghost Crab
Creature - Crab
: ~ gets +0/+1 until end of turn.
: ~ gains lifelink until end of turn.
2/1

Razor Shark
Creature - Fish
: Target creature can't block ~ this turn.
: ~ gains vigilance until end of turn.
3/5

Bottom Feeder
Creature - Fish
, sacrifice a creature: ~ gets +2/+2 until end of turn.
: ~ gains hexproof until end of turn.
3/3

Anarcho-Communism
Enchantment
Creatures have base toughness 1.

Fascism
Enchantment
When you control no creatures, sacrifice Fascism.
At the beginning of your upkeep, choose target creature with the least power, or tied for the least power. Each other creature deals damage equal to its power to that creature.

Democracy
Enchantment
At the beginning of each player's upkeep, that player draws a card if they control more creatures than any other player.

Monarchy
Enchantment
At the beginning of each player's upkeep, choose target creature and tap each other creature its controller controls. That creature gains trample and gets +1/+1 until end of turn for each creature tapped this way.

Tyranny
Enchantment
Whenever a creature enters the battlefield, Tyranny deals 1 damage to it, and that creature gets +2/+0 and gains haste until end of turn.