Aven Courier (Promo Pack) [Streets of New Capenna Commander Promos] Gremlin you may exert it as

you may exert it as it attacks

Set: Summer Magic / Edgar Type: Creature — Avatar Incarnation Rarity: Rare Cost: {3}{W}{W}{W} {0}: The next 1 damage that would be dealt to Personal Incarnation this turn is dealt to its owner instead

Set: Scourge Type: Creature — Insect Rarity: Rare Cost: {G} Flying

If it's the second time

Set: Sun & Moon: Unified Minds Type: Fighting Rarity: Promo Retreat cost: 0

Aven Courier (Promo Pack) [Streets of New Capenna Commander Promos] Gremlin you may exert it asSet: Streets of New Capenna Commander Promos Type: Creature Bird Advisor Rarity: Rare Cost: {1}{U} Flying Whenever Aven Courier attacks, choose a counter on a permanent you control. Put a counter of that kind on target permanent you control if it doesn't have a counter of that kind on it.