Merfolk Cave-Diver
Creature — Merfolk Scout
"Learn all you can of this underground sea. I suspect more secrets of our ancestors lie waiting in its depths." —Tishana
Rulings (7)
If no card is revealed, most likely because that player's library is empty, the exploring creature receives a +1/+1 counter.
Some spells or abilities might cause a creature to explore multiple times in a row. If you reveal a nonland card when a creature explores and leave it on top of your library, then the creature explores again immediately afterwards, you'll reveal the same card again.
Once an ability that causes a creature to explore begins to resolve, no player may take any other actions until it's done. Notably, opponents can't try to remove the exploring creature after you reveal a nonland card but before it receives a counter.
Legality
Formats by platform