Megamorph has almost the same gameplay as Morph: both let you play your creatures as [casthaven]Gray Ogre[/casthaven]s
Namely, that means an incredible Limited format certainly one of my personal top three since I started in 2009, and for many a top three overall as well as a pretty diverse Standard meta that despite the crazy powerful cards in Liliana of the Veil and Delver of Secrets was actually fairly diverse with some fun interactions
While playing cards are small and rectangular pieces of cardstock for playing card games or magic tricks
This can give green/white the edge in many cases
Jetfire, Ingenious Scientist / Jetfire, Air Guardian This tends to see play in Optimus Prime, Hero / Optimus Prime, Autobot Leader Commander decks, maybe out of obligation as much as anything
Because chaining basically anything into anything could help you to out-card and overpower the opponent over multiple turns