MTGNexus

Roiling Vortex 1R
Enchantment R
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.

From:

Are we getting a cycle of 2-mana anti-horseshit rare enchantments?

Oooooh... play this, deal 10 damage to target maelstrom wanderer player?

Take that Golos! Time to brush up on my metas' "cast" versus "play" commanders. I can think of two decks already that I can deploy this against. >:D