The Alright Henge (Unknown Event #UG15)

The Alright Henge {3}{G}

Artifact

{T}: Add {G}{G}.

Whenever a nontoken creature enters the battlefield under your control, put a +1/+1 counter on it.

Standard
Alchemy
Pioneer
Explorer
Modern
Historic
Legacy
Brawl
Vintage
Timeless
Commander
Pauper
Oathbreaker
Penny