Its not a particularly strong effectgiving your creatures +1/+0 for 3 mana is a tough sellbut it does have one major thing going for it
Endless Ranks of HYDRA is a sorcery that makes a 2/1 menacing Villain token for each opponent, and it returns to your hand whenever your commander enters or attacks so you can keep recasting it
Mitch also uses Machamp, but with plenty of other Fighting mons and only 4 Bills as draws, it'll be tough for him to get things in the right order, so make sure to snipe the Machop when they come up
Mass of Ghouls This card did see a reprint in Tenth Edition
Renaming it helps advertise the mechanic as something new, which every set needs, and also fits the theme of the set better (though 'entwine' isn't bad for a set riddled with tentacles)
You can give your team Islandwalk with Master of the Pearl Trident and then give them an Island if they don't have it with something like Phantasmal Terrain or the Merfolk Tribal Instant Aquitect's Will