The open-decklist metagame of Mythic Championships almost always favors the split
At least this one gums up your defenses while it builds up towards an Inevitable End
Cobalion Abilities: Cobalion employs powerful moves such as Sacred Sword, a slashing attack that bypasses defensive effects, and Iron Head, which may cause flinching
And, once its your turn again, you should be able to evolve that Pokmon to its Stage 2 from your hand, as it was already in play at the start of your turn (source: Pokmon Rulings Compendium)
Battle Compressor helps with the previously mentioned synergy between Arcanine, Magma Basin, Raihan and Blacksmith having energy in the discard pile
Select a Supporter card from your opponent's hand and return it to your opponent's deck