Reminderglass Siren

Flying

When this creature enters, navigate. (Create a Map token. (It's an artifact with "{1}, {t}, Sacrifice this artifact: Target creature you control explores. Activate only as a sorcery. (To explore, surveil 1, then reveal the surveiled card. If it's a land, put it into your hand. Otherwise, put a +1/+1 counter on this creature. (To surveil 1, look at the top card of your library. You may put it into your graveyard.))"))