Is Conclave Mentor legal in Standard, Modern, and Commander?

Conclave Mentor is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Conclave Mentor

Q: What type of card is Conclave Mentor?

Conclave Mentor is a Creature — Centaur Cleric. Its oracle text reads: "If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on that creature instead. When this creature dies, you gain life equal to its power."