Caltrops [Urza's Destiny] Elemental Avatar Set: Beta Edition Type: Sorcery

Set: Beta Edition Type: Sorcery Rarity: Rare Cost: {U}{U} Target player activates a mana ability of each land they control

Set: Modern Masters 2015 Type: Legendary Creature — Eldrazi Rarity: Mythic Cost: {15} This spell can't be countered

Centuries ago

Set: Modern Masters 2015 Type: Creature — Elemental Rarity: Rare Cost: {1}{B}{B} Wither (This deals damage to creatures in the form of -1/-1 counters

If the player doesn't

Caltrops [Urza's Destiny] Elemental Avatar Set: Beta Edition Type: SorcerySet: 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.