keeping the discussion alive
actually it's the dive ability that has some "problems"... not this card
the dive ability should double the base damage of the creature till the end of turn, but it actually seem to double the current damage, i don't recall any other cards or effects that raise the
current (not base) attack of a creature other than dive...
diving a creature multiple time SHOULD double its damage only ONCE (base damage x 2 , base damage x 2 , base damage x 2 , base damage x 2 ...)