Similarly, if Lightning leaves the battlefield and later returns, you won't be able to play the cards that were exiled the first time it was on the battlefield since it's a new object
Most green cards in MTG focus on offense, so this level of defensive coverage feels almost borrowed from white
Transforming it normally is probably too slow, so Id recommend trying to flip it manually, like with Tovolar, Dire Overlord
You have probably spent hours pouring over various resources while designing your deck
Having specific permanents you care about isnt a deal breaker since the trade is still one-for-one, but not having backup plans when they get answered is
Thisll give you a consistent advantage against your opponents, which is pretty much the entire point of playing land destruction