Caltrops [Urza's Destiny] Battle Academy Set: Black & White: Boundaries

Set: Black & White: Boundaries Crossed Type: Metal Rarity: Holo Rare Retreat cost: 2

Set: Alpha Edition Type: Enchantment — Aura Rarity: Common Cost: {B}{B} Enchant creature (Target a creature as you cast this

Set: Dominaria Prerelease Promos Type: Legendary Sorcery Rarity: Rare Cost: {5}{W}{B} (You may cast a legendary sorcery only if you control a legendary creature or planeswalker

If you control an Urza's Power-Plant and an Urza's Tower

"I was there to watch my brothers' quenching

Caltrops [Urza's Destiny] Battle Academy Set: Black & White: BoundariesSet: Urza's Destiny Type: Artifact Rarity: Uncommon Cost: {3} Whenever a creature attacks, Caltrops deals 1 damage to it. Toward the end, Gatha struggled to keep his experiments in and his patrons out.