氷(ひょう)河(が)の神(かみ)大(おお)口(ぐち)

Trample

When this creature enters, create a Lander token. (It's an artifact with ", , Sacrifice this token: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.")

Landfall − Whenever a land you control enters, creatures you control get +1/+1 and gain vigilance and haste until end of turn.