Lets say I have Richard in play and I draw a second Richard. Can I play the second one, as say a Morphling, or will the “legend rule” destroy both copies?
Have no fear. Richard’s ability turns the card into a Morphling before the game checks state-based effects. If both my opponent and I have a Richard in play, and I’ve already chosen to play a card that costs {U} as an Ancestral Recall, can my opponent choose to play another card that costs {U} as Ancestral Recall? For starters, the two of you are cheating since Richard is a legendary creature. But let’s assume hypothetically that if you could come up with a way to make this happen, then Richard limits only its controller. This means that, yes, your opponent could play an Ancestral Recall even if you’ve already played one. Your opponent is only limited by whether or not he or she played it.