Familiar Beeble Mascot is a common Stickers card from Unfinity Sticker Sheets (SUNF), collector number 24. Current market price: $0.22, TCGplayer market prices via Scryfall.
{TK}{TK} — Whenever this creature attacks, untap target permanent. {TK}{TK}{TK}{TK} — Whenever a creature enters under your control, creatures you control get +1/+1 until end of turn. {TK}{TK} — 2/3 {TK}{TK}{TK} — 5/3