Cheapest priced copy (Unfinity): $0.35 at Card Kingdom, near mint, their price list as of .
Sword-Swallowing Seraph 
Creature — Angel Performer · 4/4 · Uncommon · Unfinity · #30
Flying, vigilance
When this creature enters, you may put a name sticker on a nonland permanent you own.
{1}{W}, {T}: Put a +1/+1 counter on another target creature with a name sticker on it. Activate only as a sorcery.
Legal inCommander
Banned inLegacyVintage
Not legal inBrawlStandardPioneerModernPauper