Aether Storm | Mindslaver | Alchemist's Refuge

Cards

({7} magic symbol) ({G} magic symbol) ({U} magic symbol) ({U} magic symbol) available.

Activate
Mindslaver by paying ({4} magic symbol) and tapping it, causing you to gain control of target opponent during their next turn.
During the opponent's turn, activate
Alchemist's Refuge by paying ({G} magic symbol) ({U} magic symbol) and tapping it, allowing you to cast spells this turn as though they have flash.
Cast
Aether Storm by paying ({3} magic symbol) ({U} magic symbol) .
As the opponent, activate
Aether Storm by paying 4 life.
Repeat step 4 until the opponent has 3 or less life remaining.