This Modern Horizons III fox advisor enshrines a spot on this list by drawing cards upon casting auras, a little restricted, but you modify permanents all the time with enchantress decks
Inalla decks can be considerably more flexible when it comes to choosing their combos, as access to black opens up access to many more powerful tutors, and access to red brings Dualcaster Mage into the mix, which when combined with Inallas Eminence ability does a great Naru Meha impression for 1 less mana
Being able to do the effect at any speed makes the card quite tricky and pushes it into the realms of playable
White-Black Go Wide If you'd rather build up your army, try white-black's strategy of creating a board of tokens to overwhelm opposing forces
Nahiri, the Harbinger Nahiri, the Harbinger is a solid Boros planeswalker for several reasons