Is Mairsil, the Pretender legal in Standard, Modern, and Commander?

Mairsil, the Pretender is legal in: Legacy, Vintage, Commander.

Mairsil, the Pretender

Q: What type of card is Mairsil, the Pretender?

Mairsil, the Pretender is a Legendary Creature — Human Wizard. Its oracle text reads: "When Mairsil enters, you may exile an artifact or creature card from your hand or graveyard and put a cage counter on it. Mairsil has all activated abilities of all cards you own in exile with cage counters on them. You may activate each of those abilities only once each turn."

Legendary Creature — Human Wizard

When Mairsil enters, you may exile an artifact or creature card from your hand or graveyard and put a cage counter on it.

Mairsil has all activated abilities of all cards you own in exile with cage counters on them. You may activate each of those abilities only once each turn.

Set Commander 2017

Rarity Mythic Rare

Mana Value 4

Artist Izzy

Collector # 41

Scryfall Gatherer