Snapback [Time Spiral] Arena League 2002 Set: Commander's Arsenal Type: Enchantment

Set: Commander's Arsenal Type: Enchantment Rarity: Common Cost: {2}{U} Whenever an opponent casts a spell

Set: Eighth Edition Type: Enchantment Rarity: Rare Cost: {2}{R} Nonbasic lands are Mountains

It's so infinite that its flavor text says

Set: Fate Reforged Clash Pack Type: Legendary Enchantment Artifact Rarity: Rare Cost: {2}{B}{B} Creatures you control have lifelink

" —Gideon Jura

Snapback [Time Spiral] Arena League 2002 Set: Commander's Arsenal Type: EnchantmentSet: Time Spiral Type: Instant Rarity: Common Cost: {1}{U} You may exile a blue card from your hand rather than pay this spell's mana cost. Return target creature to its owner's hand. "If it returns years hence, our knowledge of how to combat it will be that much greater." Andorel, Tolarian sentinel