Conclave Mentor
Core Set 2021 — Uncommon
Creature — Centaur Cleric
Conclave Mentor rulings:
2020-06-23: If a creature you control would enter the battlefield with a number of +1/+1 counters on it, it enters with that many plus one instead.
2020-06-23: Conclave Mentor's first ability doesn't apply to itself if it's somehow entering the battlefield with a +1/+1 counter on it.
2020-06-23: If you control two Conclave Mentors, the number of +1/+1 counters put on a creature is two plus the original number. Three Conclave Mentors add three, and so on.
2020-06-23: If two or more effects attempt to modify how many counters would be put onto a creature you control, you choose the order to apply those effects, no matter who controls the sources of those effects.
2020-06-23: Use Conclave Mentor's power as it last existed on the battlefield to determine how much life you gain.