Forum:Earthbound Immortals and Skill Drain

Hi Guys.

So this happened to me recently.

During a duel i had my E.I summoned and my opponent used mystical space typhoon to destroy my field spell, at this point i activated skill drain. During this time i managed to summon a second E.I and play a field spell. Now having a field spell down i had no need for skill drain on the field so i destroyed it with my mystical space thyphoon (not thinking).

So my question is: What would happen to my earthbound immortals? as 'There can only be 1 face up earthbound immortal on the field' Would it be destroyed and if so would i get to choose which one to keep or would one return to my hand or would they both stay?