Thirst for Knowledge [Planechase] Elf Ally and/or an effect that Special

and/or an effect that Special Summons a monster(s) and destroy those cards

Set: Ixalan Prerelease Promos Type: Land Rarity: Rare Rootbound Crag enters the battlefield tapped unless you control a Mountain or a Forest

As long as "Umi" remains face-up on the field

Set: Duel Terminal 1 Card type: Counter Trap Rarity: Common Discard 1 card

They can't attack you or planeswalkers you control that combat

Thirst for Knowledge [Planechase] Elf Ally and/or an effect that SpecialSet: Planechase Type: Instant Rarity: Uncommon Cost: {2}{U} Draw three cards. Then discard two cards unless you discard an artifact card. Lymph, the fluid essence of blinkmoths, is prized by wizards for the rush of intellect it provides.