Mindslaver + Lethal Vapors + Alchemist's Refuge

Mindslaver

Lethal Vapors

Alchemist's Refuge

How it works

1. Activate Mindslaver by paying 4, tapping and sacrificing it, causing you to gain control of target opponent during their next turn.
2. During the opponent's turn, activate Alchemist's Refuge by paying and tapping it, allowing you to cast spells this turn as though they have flash.
3. Cast Lethal Vapors by paying 2.
4. As the opponent, activate Lethal Vapors by paying 0 an arbitrarily large number of times, causing that opponent to skip that many turns.