17 cards where the text includes “when ~ attacks”

A-Dorothea, Vengeful Victim // A-Dorothea's Retribution (Innistrad: Crimson Vow #A-235)
A-Dorothea, Vengeful Victim // A-Dorothea's Retribution (Innistrad: Crimson Vow #A-235)
Brackwater Elemental (Duel Decks: Ajani vs. Nicol Bolas #46)
Ceremonial Guard (Mercadian Masques #182)
Conqueror's Galleon // Conqueror's Foothold (Ixalan #234)
Conqueror's Galleon // Conqueror's Foothold (Ixalan #234)
Crumbling Colossus (Magic 2012 #204)
Dorothea, Vengeful Victim // Dorothea's Retribution (Innistrad: Crimson Vow #235)
Dorothea, Vengeful Victim // Dorothea's Retribution (Innistrad: Crimson Vow #235)
Fog Elemental (Tenth Edition #85)
Impetuous Devils (Eldritch Moon #132)
Keldon Battlewagon (Prophecy #139)
Mardu Blazebringer (Khans of Tarkir #115y)
Phantom Whelp (Odyssey #93)
Quicksilver Behemoth (Darksteel #30)
Runaway Carriage (Shadows over Innistrad #261)
Saprazzan Outrigger (Mercadian Masques #101)
Time Elemental (Masters Edition #53)
Vebulid (Urza's Saga #165)
Windscouter (Prophecy #53)

Though this query has ended, its relics still slumber in New Argive.