Stan Lee the Watcher

Other Legendary creatures you control get +1/+1.
{w}{u}{b}{r}{g}, {t}: Create 2 0/0 colorless Comic creature token with "This creature gets +1/+1 for each Legendary creature you control."
Sacrifice a Comic creature token, Untap Stan Lee the Watcher (Untap only as a sorcery and only once per turn.)
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"Excelsior"