mtg.wtf

{3}{U}: Return Sliptide Serpent to its owner's hand.

Slivers you control have flying and "Whenever you draw a card, this creature deals 1 damage to any target" and "{T}: Draw a card."

When Slum Reaper enters, each player sacrifices a creature of their choice.

This creature doesn't untap during your untap step.
Morbid — At the beginning of each end step, if a creature died this turn, untap this creature.

Wither

Devoid
Flying
At the beginning of your upkeep, sacrifice a creature.
Whenever you sacrifice a creature, draw a card.

At the beginning of your end step, if a creature died under your control this turn, the Ring tempts you.
Whenever the Ring tempts you, target opponent reveals cards from the top of their library until they reveal a land card. Put that card onto the battlefield tapped under your control and the rest into their graveyard.

Tribute 3
When Snake of the Golden Grove enters, if tribute wasn't paid, you gain 4 life.

Flash
Enrage — Whenever Snapping Sailback is dealt damage, put a +1/+1 counter on it.

Flying
Other enchantment creatures you control have flying.
Whenever you attack a player, create a 1/1 white Glimmer enchantment creature token that's tapped and attacking that player.

Alliance — Whenever another creature enters under your control, you gain 1 life.

Affinity for artifacts
Artifact landcycling {2}

Legendary partner (You can have two commanders if this is one of them. The other one is promoted to legendary.)
Flying, vigilance
Teamwork — Whenever you attack or block with both Sol, Advocate Eternal and its partner, support 4 and investigate four times.

Whenever Soldevi Steam Beast becomes tapped, target opponent gains 2 life.
{2}: Regenerate Soldevi Steam Beast.

Flying
Each creature card in your graveyard that's a Cleric, Rogue, Warrior, and/or Wizard has unearth {1}{B}.

When Somberwald Stag enters, you may have it fight target creature you don't control.

Menace
Whenever Sophina, Spearsage Deserter attacks, investigate once for each nontoken attacking creature.
Friends forever

When Sorin's Guide enters, you may search your library and/or graveyard for a card named Sorin, Vampire Lord, reveal it, and put it into your hand. If you search your library this way, shuffle.

Deathtouch
When Soul Drainer enters the battlefield, destroy target commander an opponent controls. Remove all commander damage that commander dealt to you. (You don't gain life, just treat it as though your commander damage from that commander is zero.)

When this creature enters, exile up to two target cards from a single graveyard. If at least one creature card was exiled this way, each opponent loses 2 life and you gain 2 life.

Flying
Whenever you cast a noncreature spell, creatures you control get +1/+1 until end of turn.

Defender, flying

Delve
If a creature card with flying was exiled with Soulflayer's delve ability, Soulflayer has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, reach, trample, and vigilance.

When Soulstinger enters, put two -1/-1 counters on target creature you control.
When Soulstinger dies, you may put a -1/-1 counter on target creature for each -1/-1 counter on Soulstinger.

Mutate {5}{U}
Flying
Whenever this creature mutates, gain control of target noncreature artifact.