
Put a +1/+1 counter on target creature and a +1/+1 counter on up to one target Merfolk.
River Heralds' Boon has 1 printing, first in Ixalan (2017). EDHREC ranks it #25,085 among Commander cards. It appears most in Nicanzil, Current Conductor decks (80 on EDHREC). It has 1 official ruling.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.