Carnarium Usher
Creature - Goblin Performer (U)
When ~ enters the battlefield, you may pay 3 life. If you do, it gains haste and indestructible until end of turn.
Sadism - ~ gets +1/+1 for each player that lost life this turn.
"Let me show you to where you would be sitting if we were boring."
[3/1]

Poet of Nothing
Creature — Zombie Bard (R)
, , Discard your hand: Draw a card for each 1 life you lost this turn. Activate this ability only as a sorcery.
He has been to the void and returns with the silent songs of the nothing that lays ahead.
1/1

Devil's Deal |
Sorcery (M)
Search your library for a card, exile it face down, then shuffle. Then each player may bid life. You start the bidding with a bid of any number. In turn order, each player may top the high bid. The bidding ends if the high bid stands. The high bidder loses life equal to the high bid and may look at and play the exiled card for as long as it remains exiled, and may spend mana as though it were mana of any type to cast that spell.

Opening Day Ritual
Instant (C)
Choose one:

• Add .
• Put a -1/-1 counter on target creature.

"Break a leg," can be taken a number of ways by Rix Maadi revelers.

Carnarium Games
Enchantment (U)
At the beginning of combat on your turn, Carnarium Games deals 1 damage to target creature and 1 damage to you.
Whenever a creature you control is dealt damage, it gets +2/+0 until end of turn.
You can tell who hasn't attended before by looking at reactions when the blood starts flying.

Vote Down —
Instant (R)
Counter target spell if its mana value is less than the number of creatures you control.
Nothing is more humiliating to an Azorius lawmaker than his favoured amendment being rejected.

Tibalt, Multiversal Mayhemist
Legendary Planeswalker — Tibalt (M)
Compleated
: Return target card from your graveyard to your hand, then discard a card at random.
: Create a 1/1 red Phyrexian Devil creature token with toxic 1 and "When this creature dies, it deals 1 damage to any target."
: Target opponent gets an emblem with "At the beginning of your upkeep, choose two permanents you control at random. Sacrifice one of them."

Ugin's Relic
Artifact (C)
When ~ enters the battlefield, draw a card.
, : Add one mana of any color to your mana pool.

Arcum's Astrolabe, but with a more restrictive mana type (snow mana can also be any color of mana; colorless can't be any color)

What's the point of the second Phyrexian mana symbol if his base loyalty is less than 5?

He lets you pay 4 life to do nothing (but trigger prowess and so on). Tibalt is wacky like that.

lol, fair enough.

Sun Sword
Artifact (U)
: Add one mana of any color.
Equipped creature gets +1/+1 for each of its colors.
Equip

The Sword of Pendelhaven |
Legendary Artifact - Equipment (R)
Equipped creature gets +1/+2.
Equip 1/1 creature
Only the weak have the strength to wield it.

Soul Machine
Artifact (M)
Each point of life is also a counter.
: Proliferate.
"Existence is not as difficult as it seems."
—instruction manual, introduction

Credit Kami
Artifact Creature — Spirit Treasure (C)
Credit Kami enters the battlefield with a +1/+1 counter.
, , Sacrifice Credit Kami: Add one mana of any color. Move Credit Kami's +1/+1 counters to up to one target creature.
The kami already embody the hard currencies of the past. Is it not even easier for them to represent currencies as intangible as they are?
0/0

Suncleanser; not that I dont like this (Im a fan of combo control/midrange myself), just an interaction

Also lands:

Profane Marsh
Land
~ enters the battlefield tapped unless you put a stun counter on it.
: Add or

I probably wouldn't erase my card to save from that interaction, but it could make me want to up the cost. I sort of wanted no mana to activate anyway.

Witherbloom Archives
Land (U)
Witherbloom Archives enters the battelfield tapped.
: Add or .
, , Sacrifice Witherbloom Archives: Choose a card from among Cram Session, Gaze of the Gorgon, or Slitherhead. Conjure a copy of that card to your hand.
Each archive is more like a terrarium than a library. More than tomes, it holds unique specimens, soil and water samples, and still-living disembodied organs.

Vector Space
Land (R)
Garrison (If this isn’t already paired with a creature, you may pair this with a creature that’s unpaired with a land whenever either enters the battlefield.)
: Add . Spend this mana only to cast instant spells and spells with flash. When you do, garrisoned creature gains flying until end of turn.

Wedgelands
Artifact Land — Food
Wedgelands enters the battlefield tapped.
: Add , , or .
, , Sacrifice Wedgelands: You gain 3 life.
The murky aroma of the rolling terrain is a reminder of the labor of the commonfolk here, who have built their homes into the natural holes of the sharp hills.

Did Alphabetical.

Caves of the Damned
Legendary Land (M)
: Add .
, , Sacrifice a Powerstone: If you control no Phyrexians, create a 0/0 black Phyrexian Germ creature token and put a +1/+1 counter on it. If you do, search your library for a Phyrexian creature card, reveal it, put it in your hand, then shuffle.

Egg Umbra |
Enchantment - Aura (C)
Enchant creature
Enchanted creature has defender.
Totem armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)