Much like Kytheon and Nissa, Jace is close to playable on his own
We considered things like legendary sorceries to parallel the single-effect summons, but none of those versions had the resonance of showing them as a creature
So when you swing with your Deadpool/Master, you'll actually create three copies of regular Deadpool, Trading Card, which trigger to swap powers with whatever good stuff is on the board
Then if youre the monarch, this enchantment deals X damage to each opponent, where X is the number of creatures you control
Feldons Cane is useful as both a sideboard and main deck card, in order to cycle through your discarded or destroyed threats and basic lands (that youve discarded to Lands Edge), and I have won very protracted games against hard control decks by decking them, simply because of the presence of a resolved Feldons Cane