Together Forever is a rare Enchantment card from March of the Machine Commander (MOC), collector number 212. Current market price: $0.30, TCGplayer market prices via Scryfall.
When this enchantment enters, support 2. (Put a +1/+1 counter on each of up to two target creatures.) {1}: Choose target creature with a counter on it. When that creature dies this turn, return that card to its owner's hand.