Hopeful Eidolon

Bestow {3}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached.) Lifelink (Damage dealt by this creature also causes you to gain that much life.) Enchanted creature gets +1/+1 and has lifelink.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6oaegd6x91pb1hbkebq7i2.