Raijin, Kami of Lightning

Partner (You can have two commanders if both have partner.)
After you resolve your second spell on a turn, you
may pay {u}{r} and choose an instant or sorcery
card in your hand. you may cast the chosen card
without paying its mana cost.
If you control Fujin, Kami of Tempests, you may
pay {w}{u}{r}, if you do, exile both Fujin, Kami of Tempests and Raijin, Kami of Lightning and
replace them with Danketsu, Kami of the Breeze
for the rest of the game.