Forum:The target of an effect monster changes

I target a monster with the effect of vampire vamp. The opponent chains mask change. The monster is now a fusion monster. Can I reselect the target or is it gone?

Also, what if the target is compulsed and sent to the hand but there are other monsters on the field, can i target a different one Surrection75 (talk • contribs) 14:02, November 30, 2015 (UTC)