
Whenever a spell or ability you control counters a spell, you may create a 1/1 blue Merfolk creature token.
Tap seven untapped Merfolk you control: Counter target spell.
Lullmage Mentor has 1 printing, first in Zendikar (2009). EDHREC ranks it #8,276 among Commander cards. It appears most in Hakbal of the Surging Soul decks (3,206 on EDHREC). It has 3 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.