First Contact — Whenever Overseer of Vault 76 or another creature with power 3 or less enters the battlefield under your control, put a quest counter on Overseer of Vault 76. At the beginning of combat on your turn, you may remove three quest counters from among permanents you control. When you do, put a +1/+1 counter on each creature you control and they gain vigilance (Attacking doesn't cause this creature to tap.) until end of turn.