Leonin Relic-Warder [Mirrodin Besieged] Basic Energy When a monster effect is

When a monster effect is activated

Set: The Dark Side of Dimensions Movie Pack: Gold Edition Card type: Normal Trap Rarity: Gold Rare When a card(s) you control is destroyed by a Spell effect (except during the Damage Step): Target 1 card your opponent controls

Take this delightful trinket for instance

{T}: Search your library for a card named Elvish Clancaller

Leonin Relic-Warder [Mirrodin Besieged] Basic Energy When a monster effect isSet: Mirrodin Besieged Type: Creature Cat Cleric Rarity: Uncommon Cost: {W}{W} When Leonin Relic Warder enters the battlefield, you may exile target artifact or enchantment. When Leonin Relic Warder leaves the battlefield, return the exiled card to the battlefield under its owner's control.