Two major gameplay mechanics for Ursulas Return have been revealed so far
Rather the two seem like they are 2 different issues
Partner gives you many options, the best of which are Kodama of the East Tree, Thrasios, Triton Hero, Ich-Tekik, Salvage Splicer, and Keskit, the Flesh Sculptor
The downside, and boy is it a minor one, is that it does deal an average of 1.5 damage to you per turn which in the grand scheme is nothing short of criminally nonexistent
Scheme Cards My Laughter Echoes Power Without Equal I Am Untouchable Mine Is the Only Truth Your Own Face Mocks You Kneel Before My Legions You Are Unworthy of Mercy Chaos Is My Plaything Your Plans Mean Nothing You Will Know True Suffering 0344_MTGDSK_Schemes: My Laughter Echoes 0367_MTGDSK_Schemes: Your Plans Mean Nothing See the schemes and tokens from Jump Scare
If you've built a Choco deck you should share your list over at our Discord server, and come join the conversation