When Bangtan Security enters the battlefield, target creature gets +2/+0 and gains indestructible until end of turn.

Vigilance
Whenever Cerys attacks, you may return a nontoken permanent you control to its owner's hand. If you do, create two 1/1 red Soldier creature tokens that are tapped and attacking.

Vigilance
Whenever this creature transforms into Crown Betrayer or another permanent you control transforms, Crown Betrayer gets +2/+0 and gains indestructible until end of turn.

Flash
Vigilance
Whenever Exuberant Caprisaur attacks or blocks, you gain 2 life. Then if your life total is greater than 20, put two +1/+1 counters on Exuberant Caprisaur.

Vigilance
Whenever Mokar Warband attacks, create a 1/1 white Human creature token that's attacking.

{1}, Remove a +1/+1 counter from Traveler of Dawn: Exile target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Equipped creature gets +2/+2.
Equip {2}
Spellcharge 4

Flying, lifelink
When Vengeful Whisper dies, create a white enchantment token named Memorial with “At the beginning of your upkeep, create a 1/1 white Spirit creature token with flying.”

When Masked Duo enters the battlefield, tap up to one target creature. If you control an artifact, that creature doesn't untap during its controller's next untap step.

Prowess, prowess

Menace
Whenever you cast an artifact spell, each opponent loses 2 life.

Whenever a creature dealt damage by Fleshbearer this turn dies, integrate that creature.
Fleshbearer gets +2/+0 and has menace as long as a creature card is integrated onto it.

Menace
Whenever Gelthis deals combat damage to a player, that player reveals their hand. You choose a nonland card from it. Exile that card until Gelthis leaves the battlefield.
Spellcharge 4

Ward—Sacrifice a permanent.
Whenever Host of the Neverending Revel enters the battlefield or attacks, each player sacrifices a nonland, nontoken permanent. For each player who doesn't, you draw a card.

Silvereye Scout can't be blocked except by three or more creatures.

Whenever Steelhorn Crusher or another artifact enters under your control, artifact creatures you control gain menace until end of turn.

Favored
Whenever your Champion deals combat damage to a player, create that many Treasure tokens.

Whenever an attacking creature you control dies, Bleeding Edge Memorial deals 1 damage to defending player.
Spellcharge 4

Trample, haste
Revolt — At the beginning of your end step, sacrifice Bloodfrenzied Vanguard unless another permanent you controlled left the battlefield this turn.

Defender
Whenever you cast an instant or sorcery spell, Dormant Slagheap loses defender until end of turn. If that spell was cast from your graveyard, put a +1/+1 counter on Dormant Slagheap.

Whenever Emberwalker enters the battlefield or attacks, exile the top card of your library. You may play it until end of turn.
As long as you're ancient, you may play cards exiled with Emberwalker.

As an additional cost to cast instant and sorcery spells, you may pay {X}, where X is that spell's mana value. If you do, copy that spell, and you may choose new targets for the copy.
Spellcharge 4

Prowess
When Speaker of the Lightning enters the battlefield, return target instant or sorcery card from your graveyard to your hand.

Trample
When Centaur Mentor enters the battlefield, target creature gets +X/+0 until end of turn, where X is your devotion to green.

Trample
When Imperfect Fugisaur enters, you may sacrifice an artifact. If you do, it gains haste until end of turn.
Whenever Imperfect Fugisaur deals combat damage to a player, that player sacrifices an artifact. If they can't, you draw a card.