For purposes of counting as a Black and White card, it needs to be just Black and White, with hybrid, gold, aftermath, or split cards and such all counting
The clear problem with this plan is for the most part it is making your deck worse against the creature matchups
But you pay two life, which is worth it
Equip it with Hammer of Nazahn to make it indestructible
Overall this is a good start, but I'd add a few more ramp cards to fill it out
2: Create a 2/2 blue Spirit creature token with vigilance and "Whenever you draw a card, put a +1/+1 counter on this token." 12: Target opponent chooses a permanent they control and returns it to its owner's hand