It's a fun throwback to Moana's goofiest companion, but the card doesn't have much value beyond the sentimental
Beatrix, Loyal General appears in 52% of decks for Adelbert Steiner on EDHREC, but I found the card to be too expensive
There's some great cards in here that will be useful in your Rise of the Floodborn collection, particularly the Merlin and Madam Mim cards, but otherwise this is the least competitive deck you can get.
The only reason he's lower on the list, is that his 3 Willpower will easily have him removed as soon as he's exerted unless you have some other means to protect him
This Floodborn version of Stitch is some of the best artwork for the character to date , so it's an especially great way to get the card
A sketch of a lion cub can be seen to the right of the card, and Rafiki's facial expression seems to come alive in the sketch