I AM SUPERMAN

Sometimes, a Magic card gets a nickname thats known over the entire player community. Like Tim, or Dr. Teeth. One of the best known of these names, certainly for an older generation of players, is Morphling, aka Superman:

The nigh-unkillable Morphling was for a long time considered to be the best blue-creature ever printed, or at least the best finisher a control deck could ask for. Flying, shroud, and vigilance were all great, but since during his heyday combat damage used the stack, you could pump him to a 5/1 as he did damage, then protect him as a 1/5. Morphling was a tasty little dish. Five years after the cards debut, a new aura was printed that gave the enchanted creatures the same abilities of Morphling.

Pemmin's Aura, which when rearranged gives you "I am Superman". Nice little easter egg I think.