Felidar Guardian [Secret Lair Drop Series] Khans of Tarkir Promos put the exiled card into

put the exiled card into your hand

For each nonland card discarded this way

[III] Destroy all Walls

Set: Invasion Type: Enchantment Rarity: Rare Cost: {3}{U} Domain — Creatures can't attack you unless their controller pays {X} for each creature they control that's attacking you

Felidar Guardian [Secret Lair Drop Series] Khans of Tarkir Promos put the exiled card intoSet: Secret Lair Drop Series Type: Creature Cat Beast Rarity: Rare Cost: {3}{W} When Felidar Guardian enters the battlefield, you may exile another target permanent you control, then return that card to the battlefield under its owner's control. Evading a felidar guardian is possible only with audacity, luck, and a warm sunbeam.