Summary: Take their best card, take something that blanks their plays for a turn or two, or take their one out to your best card
GET ALL 4 MODERN HORIZONS 3 DECKSFill your graveyard and avenge the dead with Graveyard Overdrive, ramp lands and grow value with Tricky Terrain, use energy counters for powerful payoffs with Creative Energy, or unleash Eldrazi to devour all in your path with Eldrazi Incursion
Zidane, Tantalus Thief Zidane is interesting here as a gift commander, who is also sort of a Threaten commander and working with blinks to be very interesting for johnny players
Get a decent build around it, and youll have your opponents taking care of each other as you sit back and enjoy the carnage
Effects that last "for as long as that creature has a [kind of] counter on it," such as Aven Mimeomancer's, stop applying to Me, the immortal once it leaves the battlefield