Boots, the Monkey

Creature spells you cast cost {1} less to cast.
If Dora, the Explorer is on the battlefield, creature spells you cast cost {2} less to cast.
If Backpack, Dora, the Explorer, and Map
are on the battlefield under your control, you may exile Boots, the Monkey and cast Boots, Primate of Power from outside the game without paying its mana cost.