Level counters only exist on the battlefield, so in any other zone, the Leveler creature is level 0, and has the stats and abilities it would have upon normally entering the battlefield
This meant that as of Sixth Editions printing, any card that wasnt immediately reprinted in the base set from those three expansions would be placed on the reserved list
Equip Legendary Artifact - Equipment Color tag templates(None) Swiftfoot Boots Equipped creature has hexproof and haste
I have to imagine red is going to have a creature that gives you an energy counter whenever you play an instant or sorcery, there is one that triggers off of landfall, there is one that triggers off a creature dying, etc
Exchanging two creatures' text boxes means that each one loses its rules text and replaces it with the rules text the other one had
In order to prevent problems and replacement Cancellation is not allowed