Defense of the Heart (100) [Urza's Legacy] Bolas's Meditation Realm Whenever you tap a Swamp

Whenever you tap a Swamp for mana

Set: Amonkhet Invocations Type: Creature — Angel Rarity: Mythic Cost: {3}{B}{B} Kicker {W}{W} (You may pay an additional {W}{W} as you cast this spell

They enshrined it

Set: Beta Edition Type: Creature — Rat Rarity: Common Cost: {2}{B} Plague Rats's power and toughness are each equal to the number of creatures named Plague Rats on the battlefield

Defense of the Heart (100) [Urza's Legacy] Bolas's Meditation Realm Whenever you tap a SwampSet: Urza's Legacy Type: Enchantment Rarity: Rare Cost: {3}{G} At the beginning of your upkeep, if an opponent controls three or more creatures, sacrifice Defense of the Heart, search your library for up to two creature cards, put those cards onto the battlefield, then shuffle.