The Speaker

Eminence —At the beginning of your upkeep, if The Speaker is in the command zone or on the battlefield, add {w}{u}, {w}{b} or {r}{w}.

Commander graft 10 (If this creature is your commander, it starts the game with 10 +1/+1 counters on it. Whenever another creature enters the battlefield, you may move a +1/+1 counter from this creature onto it.)

Mentor

White Guardian creature cards you cast cost {w}
less to cast.