Sneak Attack [Urza's Saga] Wizards of the Coast Online Store Set: Legends Type: Legendary Creature

Set: Legends Type: Legendary Creature — Human Warrior Rare Cost: {3}{W}{W}{U}{U} First strike Creatures with islandwalk can be blocked as though they didn't have islandwalk

Grand Cenobite

Set: Kaladesh Inventions Type: Artifact Mythic Cost: {3} {4}

Set: Limited Edition Alpha Type: Enchantment — Aura Rare Cost: {B}{B} Enchant artifact At the beginning of the upkeep of enchanted artifact's controller

then repeats this process until a creature card or X cards have been put into their graveyard this way

Sneak Attack [Urza's Saga] Wizards of the Coast Online Store Set: Legends Type: Legendary CreatureSet: Urza's Saga Type: Enchantment Rare Cost: {3}{R} {R}: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step. "Nothin' beat surprise'cept rock."