Slum Reaper

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

Swift Justice

Until end of turn, target creature gets +1/+0 and gains first strike and lifelink.

Guild Feud

At the beginning of your upkeep, target opponent reveals the top three cards of their library, may put a creature card from among them onto the battlefield, then puts the rest into their graveyard. You do the same with the top three cards of your library. If two creatures are put onto the battlefield this way, those creatures fight each other.

Stormtide Leviathan

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
All lands are Islands in addition to their other types.
Creatures without flying or islandwalk can’t attack.

Acidic Slime

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
When Acidic Slime enters, destroy target artifact, enchantment, or land.

Krenko, Mob Boss

: Create X 1/1 red Goblin creature tokens, where X is the number of Goblins you control.

Elvish Archdruid

Other Elf creatures you control get +1/+1.
: Add for each Elf you control.

Electrolyze

Electrolyze deals 2 damage divided as you choose among one or two targets.
Draw a card.

Second Guess

Counter target spell that’s the second spell cast this turn.

Goldnight Redeemer

Flying
When Goldnight Redeemer enters, you gain 2 life for each other creature you control.

Cathars’ Crusade

Whenever a creature you control enters, put a +1/+1 counter on each creature you control.

Defy Death

Return target creature card from your graveyard to the battlefield. If it’s an Angel, put two +1/+1 counters on it.

Slayers’ Stronghold

: Add .
, : Target creature gets +2/+0 and gains vigilance and haste until end of turn.

Pillar of Flame

Pillar of Flame deals 2 damage to any target. If a creature dealt damage this way would die this turn, exile it instead.

Faithless Looting

Draw two cards, then discard two cards.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Wild Hunger

Target creature gets +3/+1 and gains trample until end of turn.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Break of Day

Creatures you control get +1/+1 until end of turn.
Fateful hour — If you have 5 or less life, those creatures gain indestructible until end of turn. (Damage and effects that say “destroy” don’t destroy them.)

Relentless Skaabs

As an additional cost to cast this spell, exile a creature card from your graveyard.
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner’s control with a +1/+1 counter on it.)