Armageddon [Starter 1999] Elf Warrior then repeats this process until

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

Whenever a creature you control of the chosen type enters the battlefield or attacks

must come down

Set: Portal Three Kingdoms Type: Creature — Dog Rarity: Common Cost: {2}{R} Mountainwalk (This creature can't be blocked as long as defending player controls a Mountain

Set: Zendikar Type: Creature — Snake Rarity: Mythic Cost: {1}{G} Landfall — Whenever a land enters the battlefield under your control

Armageddon [Starter 1999] Elf Warrior then repeats this process untilSet: Starter 1999 Type: Sorcery Rarity: Rare Cost: {3}{W} Destroy all lands.