This card is playable because of the body and Learn is just a good extra
Creature - Demon Color tag templates(None) Blood Celebrant , Pay 1 life: Add one mana of any color

Cavern Harpy really good interactions with Yarok, can be used for some etb-abilities abuse/combo Ice Cave just a funny card I wanted to give a shot there, not sure if it's something worth 3.) Cloning your Surrakars cards: Mirror of the Forebears not the most flavourful one, but gives you a cheap way to get more Surrakars so it deserves being at least mentioned Fated Infatuation same comment as for the Mirror, with the advantage of the more abstract card name / waterpoint in the illustration Mimic Vat classic card, not the most flavourful Wall of Stolen Identity more of a Ravnica-themed card, but worth mentioning Phantasmal Image if you can alter a bit the card's image, it could be some Surrakar there / otherwise, it's a good card, and the illustration is strange enough to not injure your theme-deck-style imo Metamorphic Alteration also a nice one Mirror Image not as good as the others, still a wildish illustration style according well with Surrakars Unstable Shapeshifter funny card, a quality+ illustration Bramble Sovereign Surrakars also living in the Guum Wilds/Tangled Vale, this one feels really good / has some interactions with Yarok Rite of Replication Zendikar-themed, water-themed, excellent card, good interactions with Yarok Supplant Form let's just assume for a while that this is Surrakar's magic lel Dual Nature yeh it is slow, but it is strong / interactions with Yarok 4.) Tribal outlet: Metallic Mimic one more Surrakar buffing your Surrakars, despite lacking a Surrakar-ish illustration Herald's Horn will also work with Shapeshifter if you add some Vanquisher's Banner I don't particularly like it, but still worth mentioning Brass Herald good interaction with Yarok Kindred Discovery good interaction with Yarok Patriarch's Bidding personal favourite, it's a lot more fun than Mortal Combat you're running, and fits better with your themes / interacts with Yarok Riptide Shapeshifter weird card, costs a lot of mana, good effect even if you could just run Natural Order instead 5.) Yarok outlet Panharmonicon I know your strategy is different, but I always find it more interesting when your commander actually is useful Yarok's Fenlurker flavourful, fine card Bala Ged Scorpion flavourful, ok/bad card Bojuka Bog flavourful, fine card 6.) Other cards Memory Plunder for the illustration I hope you'll find something helpful amongst those suggestions, keep on brewing and thanks for sharing it

Maha can be a fairly miserable card to play against