It becomes an Angel in addition to its other types and gains flying
O-Kagachi, Vengeful Kami ( F, PF ) - This is a 6/6 for 5 that is free if you have Morophon, the Boundless
Just for reference, a modal spell or ability is anything formatted with the word choose followed by bulleted options, and a number of modes indicated to be chosen
If you are a fan of Witcher and dont prefer the overall Hearthstone, and Magic The Gathering vibes, this is a good alternative
You can also mix in blitz creatures or temporary tokens from abilities like myriad
But you get to cast the real one later for free, so the best pattern is to play a cheap spell first and a bigger one later, like a Time Warp or Stock Up