This is a good ability on its own, but it has an additional effect, where if the enemy has a mana cost of 5 more, then a token copy is created of the creature
Use a sturdy cardboard box, organize your cards into neat rows, add dividers where needed, and fill any empty space with packing material so the cards do not shift during transit
While we don't intend to exile everything with his ultimate...don't rule out the nuclear option
Its ability to spit out tokens, while being an enormous undercosted flying creature, helped it kickstart its own deck, designed to get around its tricky casting restrictions
(Mana cost includes color.)
It is a bit of a higher cost, but green can very easily generate more mana than they have lands