$0.34
Roiling Vortex 
Enchantment
Zendikar Rising Rare
At the beginning of each player's upkeep, Roiling Vortex deals 1 damage to them.
Whenever a player casts a spell, if no mana was spent to cast that spell, Roiling Vortex deals 5 damage to that player.
: Your opponents can't gain life this turn.
Whenever a player casts a spell, if no mana was spent to cast that spell, Roiling Vortex deals 5 damage to that player.
: Your opponents can't gain life this turn.#156 — Illus. Campbell White