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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.
{R}: Your opponents can't gain life this turn.
Activating Roiling Vortex’s last ability won’t undo any life gained before it resolved.
An ability that triggers when a player casts a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
In a Two-Headed Giant game, Roiling Vortex’s first ability triggers twice during each team’s upkeep. Each instance deals 1 damage to one of the players on that team.
