Contract eye

{e}Contract(Limit 1): Action: A willing
creature become bound to you. An unwilling
creature must succeed on a DC 13 Wisdom
saving throw or become bound to you. On a success they can never be contracted using this eye.
{e}Summon: Action: Summon the creature
that is bound to you for 1 hour or until it
reaches 0 hp, at which point it returns to the
contract. Once the creature returns to the
contract, you suffer 1 level of exhaustion.