While having permanents of every color is ideal with Bloom Tender, its perfectly fine even in 2-color decks
Deck Filters Agent Phil Coulson 87%inclusion 86%synergy 68 decks 78 decks Captain America, Wings of Freedom 81%inclusion 80%synergy 62 decks 77 decks Captain America's Shield 71%inclusion 69%synergy 55 decks 78 decks Avengers Assemble
Meanwhile, Tidus, Blitzball Star is unfortunately the worst multicolor uncommon in the set
If we have it on the battlefield alongside Confiscate, we can copy the Confiscate each turn, slowly eating away our opponent's mana base
In general, I would guess its more likely to be found in a B/W deck, taking advantage of stuff like Silkwrap, or Abzan with its Charge and Anafenza (at least in Standard)
Adding 10 mana is no small matter, but even drawing two extra cards a turn is pretty good