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Kin-Tree Severance Yes, I get that Despark might not see as much play as it once did, but Kin-Tree Severance is flexible and hits surprisingly more targets and leaves no condition to get the exiled permanent back
All of that and a Continuous Spell Card that lets you Special Summon an additional "Gladiator Beast" from your Deck, as well as a powerful Test Tiger-style Link Monster
Its unlikely youll ever want to risk attacking with Rallier, but the fact that you have the option is great
How much does Howlpack Resurgence cost
Also, after blowing everything away with the first effect, it can return with its own third effect, but since it's just a big fish after it returns, it might be fine to use it as material for something like Final Sigma