A 2/2 for 2B is barely acceptable for Limited, and the condition that you must control a vampire to enable blocking is nonsense
Plenty of Magic's best equipments are legendary, including Shadowspear, Embercleave, and Blackblade Reforged
Eventually, this results in the birth of Gerrard Capashen, who is completely unaware of his prominent role
Since damage persists in the form of counters, their 3/3 would effectively turn into a 3/1, but there is no real difference between a 3/3 and a 3/1 when wed challenge it with our 3/4 on the subsequent turn
Being perfectly technical, you would have to say something like "the source of the ability that exiled this card" instead of "the permanent that exiled this card", but I think this change in wording is much more legible and worth committing to the rules statement "A permanent has exiled another card if it was the source of an ability that exiled that card." More critically though, there's a bit of a who's on first sort of pronoun game going on in this wording