
Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)
Lord of Atlantis has 27 printings, first in Unlimited Edition (1993). EDHREC ranks it #4,996 among Commander cards. It appears most in Hakbal of the Surging Soul decks (15,320 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.