Sunken Palace's second ability by paying ({1} magic symbol) ({U} magic symbol) , tapping it and exiling seven cards from your graveyard, adding ({U} magic symbol) .
Put any triggered ability on the stack.
Holding priority, activate
Mister Fantastic by paying ({R} magic symbol) ({G} magic symbol) ({W} magic symbol) ({U} magic symbol) and tapping it, ensuring to use the mana from