Flying, trample

Whenever one or more opponents each lose exactly 1 life, put a +1/+1 counter on Ob Nixilis, Captive Kingpin. Exile the top card of your library. Until your next end step, you may play that card.

Flying, trample

Whenever an opponent searches their library, that player sacrifices a creature and loses 10 life.

Whenever another creature dies, put a +1/+1 counter on Ob Nixilis, Unshackled.

Flying

When Oceanus Dragon enters the battlefield, tap target creature an opponent controls. Goad it. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Flying, vigilance

Whenever a Dragon you control attacks, tap target nonland permanent an opponent controls. That permanent doesn't untap during its controller's next untap step.

Flying, trample

Whenever O-Kagachi, Vengeful Kami deals combat damage to a player, if that player attacked you during their last turn, exile target nonland permanent that player controls.

Haste

At the beginning of your upkeep, return a red creature you control to its owner's hand.

Trample

Whenever another creature dies, put a +1/+1 counter on Orca, Siege Demon.

When Orca dies, it deals damage equal to its power divided as you choose among any number of targets.

This spell costs less to cast for each land card in your graveyard.

Flying, haste

Flying, trample, lifelink

Sacrifice another creature: Draw a card.

Flying

When Overseer of the Damned enters the battlefield, you may destroy target creature.

Whenever a nontoken creature an opponent controls dies, create a tapped 2/2 black Zombie creature token.

Flying, trample

At the beginning of your upkeep, sacrifice Palladia-Mors unless you pay .

Flying

: Paragon of Modernity gets +1/+1 until end of turn. If exactly three colors of mana were spent to activate this ability, put a +1/+1 counter on it instead.

When Patron of the Arts enters the battlefield or dies, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Flying

: Pearl Dragon gets +0/+1 until end of turn.

Flying

When Phantasmal Dragon becomes the target of a spell or ability, sacrifice it.

Coruscating Flames — Whenever you cast an instant or sorcery spell, Pink Horror deals 2 damage to any target.

Split — When Pink Horror dies, create two 2/2 blue and red Demon Horror creature tokens named Blue Horror with "Whenever you cast an instant or sorcery spell, this creature deals 1 damage to any target."

First strike

At the beginning of your upkeep, sacrifice Pit Spawn unless you pay .

Whenever Pit Spawn deals damage to a creature, exile that creature.

Flying

Whenever Planar Ally attacks, venture into the dungeon. (Enter the first room or advance to the next room.)

Flying

When Plundering Predator enters the battlefield, you may discard a card. If you do, draw a card.

Flying

Devour 2 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with twice that many +1/+1 counters on it.)

Whenever Preyseizer Dragon attacks, it deals damage to any target equal to the number of +1/+1 counters on Preyseizer Dragon.

Flying

As long as Pristine Angel is untapped, it has protection from artifacts and from each color.

Whenever you cast a spell, you may untap Pristine Angel.

When you cast this spell, create X 0/1 red Kobold creature tokens named Kobolds of Kher Keep, where X is the amount of mana spent to cast it.

Flying

Sacrifice another creature: Prossh, Skyraider of Kher gets +1/+0 until end of turn.

Counter target noncreature spell. (Then exile this card. You may cast the creature later from exile.)

Flying

Whenever Purifying Dragon attacks, it deals 1 damage to target creature defending player controls. If that creature is a Zombie, Purifying Dragon deals 2 damage to it instead.

Flying, lifelink

Whenever Radiant Solar or another nontoken creature enters the battlefield under your control, venture into the dungeon. (Enter the first room or advance to the next room.)

, Discard Radiant Solar: Venture into the dungeon and you gain 3 life.

Flying

Tap another untapped creature you control with flying: Radiant, Serra Archangel gains protection from the color of your choice until end of turn.

Partner (You can have two commanders if both have partner.)

Spectacle (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)

When Rafter Demon enters the battlefield, if its spectacle cost was paid, each opponent discards a card.

: Rakdos Pit Dragon gains flying until end of turn.

: Rakdos Pit Dragon gets +1/+0 until end of turn.

Hellbent — Rakdos Pit Dragon has double strike as long as you have no cards in hand.

You can't cast this spell unless an opponent lost life this turn.

Flying, trample

Creature spells you cast cost less to cast for each 1 life your opponents have lost this turn.

Flying, trample

Whenever you sacrifice another creature, exile cards equal to its mana value from the top of target player's library. Until your next end step, you may play those cards, and mana of any type can be spent to cast those spells.

Sacrifice another creature: Rakdos, the Muscle gains indestructible until end of turn. Tap it. Activate only once each turn.

: Rakshasa Deathdealer gets +2/+2 until end of turn.

: Regenerate Rakshasa Deathdealer.

Exploit (When this creature enters the battlefield, you may sacrifice a creature.)

When Rakshasa Gravecaller exploits a creature, create two 2/2 black Zombie creature tokens.

Flying

Whenever you cast a spell, put a +1/+1 counter on Ramos, Dragon Engine for each of that spell's colors.

Remove five +1/+1 counters from Ramos: Add . Activate only once each turn.

Flying (This creature can't be blocked except by creatures with flying or reach.)

When Rathi Dragon enters the battlefield, sacrifice it unless you sacrifice two Mountains.

Flying, trample

Pay 2 life, Sacrifice another creature: Search your library for a card, put that card into your hand, then shuffle.

Black creatures can't block.

Flying

Morbid — At the beginning of each end step, if a creature died this turn, destroy target non-Demon creature.

Sacrifice Reckless Barbarian: Add .

Partner with Krav, the Unredeemed (When this creature enters the battlefield, target player may put Krav into their hand from their library, then shuffle.)

Flying

At the beginning of each end step, if your team gained life this turn, create two 1/1 white Warrior creature tokens.

Flying

Whenever another creature enters the battlefield under your control, you may pay . When you do, put X +1/+1 counters on that creature.

As long as you control five or more modified creatures, Remnant of the Rising Star gets +5/+5 and has trample. (Equipment, Auras you control, and counters are modifications.)

Flying

Whenever another non-Spirit creature you control dies, create a 1/1 white Spirit creature token with flying.

Flying

At the beginning of each end step, if you gained 5 or more life this turn, create a 4/4 white Angel creature token with flying and vigilance.

: Until end of turn, Resplendent Angel gets +2/+2 and gains lifelink.

Flash

Flying

When Restoration Angel enters the battlefield, you may exile target non-Angel creature you control, then return that card to the battlefield under your control.

Flying

Other multicolored creatures you control get +1/+0.

Whenever another multicolored creature you control dies, return it to its owner's hand at the beginning of the next end step.

Flying

: Tap target creature and put an ice counter on it. ( can be paid with one mana from a snow source.)

Creatures with ice counters on them don't untap during their controllers' untap steps.

Flying

Whenever Rith, the Awakener deals combat damage to a player, you may pay . If you do, choose a color, then create a 1/1 green Saproling creature token for each permanent of that color.

Flying, deathtouch, lifelink

Whenever you gain life, Rodolf Duskbringer gains indestructible until end of turn.

At the beginning of your end step, you may pay . When you do, return target creature card with mana value X or less from your graveyard to the battlefield, where X is the amount of life you gained this turn.

Flying

, Exile Runehorn Hellkite from your graveyard: Each player discards their hand, then draws seven cards.

Flying

Whenever you sacrifice a creature, target opponent sacrifices a creature.