It also triggers combat damage, not attack, so you can't use it to get rid a blocker for your ground-bound troop
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
It becomes an Angel in addition to its other types and gains flying
For Commander, it gets stronger the higher the power level gets since youre more likely to encounter free spells like Force of Will and non-land mana acceleration
Koh, the Face Stealer Koh is one of the coolest designs in the set
O-Kagachi, Vengeful Kami ( F, PF ) - This is a 6/6 for 5 that is free if you have Morophon, the Boundless