Fae Dominion is a Blue/Black Fairy Tribal (typal) deck, with plenty of tricks that befit the playful but often cruel nature of the fae
You need to be careful with your triggers on this one, as you want to make sure that the Cactuars 10,000 Needles resolves before the Mage Slayers does, otherwise, youre just dealing one measly point of damage
As some Partner commanders are mono-colored and others are dual-colored, through the use of Partner commanders, you can create a deck of anywhere from one to four colors
Thats huge in decks where you rely on your artifact creatures, engines, or token generators to stick around
If your extra creature is bounced or flickered, if it dies, or whatever, it's still a part of the gameyou can replay it, and it adds to your threshold, and so on