Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)

Other creatures you control have melee. (If a creature has multiple instances of melee, each triggers separately.)

Commander creatures you own have "Whenever this creature attacks a player, if no opponent has more life than that player, put a +1/+1 counter on this creature. It gains deathtouch and indestructible until end of turn."

Whenever one or more modified creatures you control attack, untap all modified creatures you control. After this combat phase, there is an additional combat phase. This ability triggers only once each turn. (Equipment, Auras you control, and counters are modifications.)

Whenever Akroan Hoplite attacks, it gets +X/+0 until end of turn, where X is the number of attacking creatures you control.

Flying

Whenever Angelic Captain attacks, it gets +1/+1 until end of turn for each other attacking Ally.

{T}: Add one mana of any color in your commander's color identity.

Flying

Whenever Archon of Cruelty enters the battlefield or attacks, target opponent sacrifices a creature or planeswalker, discards a card, and loses 3 life. You draw a card and gain 3 life.

Flying, vigilance, haste

Whenever Aurelia, the Warleader attacks for the first time each turn, untap all creatures you control. After this phase, there is an additional combat phase.

+1: Put a +1/+1 counter on up to one target creature. It gains vigilance until end of turn.

-1: Whenever a creature attacks this turn, put a +1/+1 counter on it.

-6: Creatures you control get +2/+2 and gain flying until end of turn.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

{1}, {T}: Add {R}{W}.

Whenever a creature you control attacks, defending player loses 1 life and you gain 1 life.

{3}{R/W}{R/W}: Creatures your opponents control block this turn if able, and you choose how those creatures block.

Riot (This creature enters the battlefield with your choice of a +1/+1 counter or haste.)

Whenever Clamor Shaman attacks, target creature an opponent controls can't block this turn.

{T}: Add one mana of any color in your commander's color identity.

Leading from the Front -- Whenever Commissar Severina Raine attacks, each opponent loses X life, where X is the number of other attacking creatures.

Summary Execution -- {2}, Sacrifice another creature: You gain 2 life and draw a card.

Choose one --

• Prevent all combat damage that would be dealt this turn.

• Regenerate target creature.

• Counter target spell that targets you.

Exile target permanent with mana value 4 or greater.

First strike

Whenever Dromoka Captain attacks, bolster 1. (Choose a creature with the least toughness among creatures you control and put a +1/+1 counter on it.)

Flying, double strike

You have hexproof.

If your life total would be reduced to 0 or less, instead transform Enduring Angel and your life total becomes 3. Then if Enduring Angel didn't transform this way, you lose the game.

Flying

You have hexproof.

Angelic Enforcer's power and toughness are each equal to your life total.

Whenever Angelic Enforcer attacks, double your life total.

Whenever Etali, Primal Storm attacks, exile the top card of each player's library, then you may cast any number of spells from among those cards without paying their mana costs.

Battalion -- Whenever Frontline Medic and at least two other creatures attack, creatures you control gain indestructible until end of turn.

Sacrifice Frontline Medic: Counter target spell with {X} in its mana cost unless its controller pays {3}.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

{1}{R}: Goblin Banneret gets +2/+0 until end of turn.

Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)

{2}{W}, Remove two +1/+1 counters from among creatures you control: Destroy target artifact or enchantment.

Counter target artifact or enchantment spell. Its controller gains life equal to its mana value.

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If a creature attacking causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Whenever Krenko, Tin Street Kingpin attacks, put a +1/+1 counter on it, then create a number of 1/1 red Goblin creature tokens equal to Krenko's power.

Whenever Leonin Warleader attacks, create two 1/1 white Cat creature tokens with lifelink that are tapped and attacking.

Whenever a nontoken creature you control attacks, create a 1/1 red Goblin creature token that's tapped and attacking.

Sacrifice Mardu Ascendancy: Creatures you control get +0/+3 until end of turn.

Whenever a nontoken creature you control attacks, you may pay {W}. If you do, create a 1/1 white Kithkin Soldier creature token that's tapped and attacking.

During your turn, your opponents can't cast spells or activate abilities of artifacts, creatures, or enchantments.

Whenever Myrel, Shield of Argive attacks, create X 1/1 colorless Soldier artifact creature tokens, where X is the number of Soldiers you control.

{1}, {T}: Add {W}{B}.

Flying, lifelink, haste

Whenever Otharri, Suns' Glory attacks, you get an experience counter. Then create a 2/2 red Rebel creature token that's tapped and attacking for each experience counter you have.

{2}{R}{W}, Tap an untapped Rebel you control: Return Otharri from your graveyard to the battlefield tapped.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

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.

When Rage Forger enters the battlefield, put a +1/+1 counter on each other Shaman creature you control.

Whenever a creature you control with a +1/+1 counter on it attacks, you may have that creature deal 1 damage to target player or planeswalker.

{1}, {T}: Add {B}{R}.

Counter target spell that targets a permanent you control.

Flying

Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.)

Whenever Scourge of the Throne attacks for the first time each turn, if it's attacking the player with the most life or tied for most life, untap all attacking creatures. After this phase, there is an additional combat phase.

Flying

Whenever Skyknight Vanguard attacks, create a 1/1 white Soldier creature token that's tapped and attacking.

{T}: Add {C}{C}.

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.)

Equip {1}

Flying

Raid -- When Wingmate Roc enters the battlefield, if you attacked this turn, create a 3/4 white Bird creature token with flying.

Whenever Wingmate Roc attacks, you gain 1 life for each attacking creature.