Tropical Rainforest Jaguar Lair doesnt really work as youll probably be removing damaged characters
Sultai Mutate likely would have scored much better if it were Sultai X-Matters instead, with Zaxara, the Exemplary as the face Commander and the underpowered and unexciting Otrimi, the Ever-Playful as a backup commander along with a light mutate sub-theme for players who want to build a mutate Commander deck with new Ikoria cards
Plus, keeping one mana up as a Blue player is a completely natural thing to do, and just the threat of this card will have your opponents reconsidering their life choices
For Yuna, Hope of Spira to literally resurrect summons and other enchantments in the way that it does is borderline uncanny
Tips: Give Xantcha to people who: dont have obvious sacrifice outlets have good attack targets that wont block her effectively will take their turn soonest after us, to reduce opponents opportunities to react Deflect attention as best as possible