Caltrops [Urza's Destiny] Phyrexian Horror Minion Set: The List Type: Enchantment

Set: The List Type: Enchantment Rarity: Rare Cost: {2}{R} Nonbasic lands are Mountains

Set: Alpha Edition Type: Creature — Serpent Rarity: Common Cost: {5}{U} Sea Serpent can't attack unless defending player controls an Island

You never know who they've been

Set: EX: Dragon Frontiers Type: Darkness Rarity: Rare Retreat cost: Colorless

Set: Ultimate Masters Type: Instant Rarity: Rare Cost: {B} Search your library for a card

Caltrops [Urza's Destiny] Phyrexian Horror Minion Set: The List Type: EnchantmentSet: 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.