msem-instigator

(As this Discovery enters and after your draw step, add a progress counter. Stop after you've discovered.)
Target creature or planeswalker you control explores. (Reveal the top card of your library. Put it into your hand if it's a land. Otherwise, put a +1/+1 or loyalty counter on that permanent, then you may mill that card.)
You may play an additional land this turn.
C — At the beginning of your upkeep, if you control seven or more differently named permanents, create a 1/1 Scout creature token that's all colors.