Thricening Bolt
Instant
~ deals 3 damage to three different target creatures or players.
Take that! And that! And that!

Goblin with hexproof!
Thanks Hairless Thoctar!

Phoenix of Hope
Creature - Phoenix
Flying
At the start of your upkeep, if Phoenix of Hope is in your graveyard, and you control at least one creature on the battlefield, you may place Phoenix of Hope onto the battlefield. At the start of your upkeep, if Phoenix of Hope is in the graveyard and you do not control any creatures on the battlefield, exile Phoenix of Hope. At the start of your upkeep, if you control Phoenix of Hope and don't control any other creatures on the battlefield, tap Phoenix of Hope, and it can't be un-tapped this turn.
The phoenix can't truly die until hope does.
4/3

Kind of meant to be something of a Phylactery Lich variant for Red. Not sure if balanced.

Edit: Ninjaed!

Ruby of Flame –
Artifact
Sacrifice Ruby of Flame: Choose two—Ruby of Flame deals 1 damage to target creature; or Ruby of Flame deals 1 damage to target player; or add to your mana pool; or draw a card.

Torchlight Phoenix

Creature-Phoenix (R)
Flying
As long as Torchlight Phoenix is in your graveyard, instants and sorceries you cast cost less.
4/2

Sirocco Seer

Creature -- Efreet (R)
As Sirocco Seer enters the battlefield, discard your hand, then draw five cards. Sirocco Seer enters the battlefield with a number of +1/+1 counters equal to the number of cards discarded in this way.
0/0

Bloodfire

Instant (U)
Paincast - Bloodfire costs less for each life an opponent has lost this turn.
Bloodfire deals 4 damage to target creature or player.

Star of Passion
Enchantment
Star of Passion can't be countered. Protection from blue.
You have protection from blue.
Creatures you control have haste and protection from Blue.
: Creatures target opponent controls must attack this turn if able.
During your end phase, if any creatures you control dealt combat damage this turn, put a +1/+1 counter on each creature you control.

Disintegration Beam

Sorcery (R)
Disintegration Beam deals 8 damage to target creature or player; 6 damage to another target creature or player; 4 damage to a third target creature or player; and 2 damage to a fourth target creature or player.

Magma King
Legendary Creature - Dragon Elemental
Flying, First Strike, Protection from Red, from Black, and from Blue.
Red elemental creatures besides Magma King you control get first-strike and +2/+0.
When Magma King enters the battlefield, you may look at the top 6 cards of your deck, you may place any red colored elemental creatures among those cards, or in your hand, onto the battlefield without paying their mana cost, as long as their name isn't Magma King. The remaining cards you looked at this way are shuffled back into your deck.
7/5

Planar Collision

Sorcery (M)
Remove all permanents and graveyards from the game, then restart the game.

Shouldn't this have a "without them" or something clause?

Squirrel
Creature - Squirrel
You may only cast ~ if a forest card entered the battlefield under your control this turn.
1/1

Squirrel
Creature - Squirrel
You may only cast ~ if a forest card entered the battlefield under your control this turn.
1/1

Wood Dancer
Creature - Elf Shaman
If your devotion to green is at least 2, Wood Dancer has reach.
If your devotion to green is at least 3, Wood Dancer gets +1/+1.
If your devotion to green is at least 4, Wood Dancer has hexproof.
1/1

Vizu-Ghati Groundskeeper

Creature-Human Shaman
When Vizu-Ghati Groundskeeper enters the battlefield, if was spent to cast Vizu-Ghati Groundskeeper, destroy target enchantment.
2/1

Invocation of Gaea

Sorcery (U)
Search your library for a basic Forest card, put it onto the battlefield tapped, then shuffle your library.
Target creature gets +X/+X until the end of turn, where X is the number of Forests you control.

Entmeet -
Enchantment
Forests you control are 1/1 green Treefolk creatures that are still lands.
Treefolk you control have shroud.

Monster Bullfrog

Creature-Frog Beast (R)
Reach, islandwalk, swampwalk
When Monster Bullfrog enters the battlefield, you may destroy target creature with flying, islandwalk, or swampwalk.
5/5

Claytooth Troll
Creature — Troll
: Regenerate Claytooth Troll.
3/3

Sandstorm Wurm

Creature-Wurm (R)
Trample
Whenever Sandstorm Wurm deals combat damage to an opponent, destroy target artifact, enchantment, or land that player controls.
7/7