Neither move of Magnezone is too great, but you could utilize a spread damage type strategy by using Speed Shot on one of your opponent's benched Pokemon but I would mainly use Crush Volt and just make sure to have another energy card in my hand to attach to it the next turn so I could use the move again
Sygg, Wanderwine Wisdom / Sygg, Wanderbrine Shield The synergies and interactions of this version of Sygg can fill an ocean
Kaalia of the Vast can cheat it from your hand (since it's a dragon), Yuna, Hope of Spira can bring it back from your graveyard (since it's an enchantment), and Esper Terra can copy it and trigger most of Bahamut's value by advancing three chapters: Summon: Bahamut isnt legendary, so Esper Terra has no problem copying it
These Baloths cost six mana, and you get a Green 6/6 with trample for that investment that has landfall shockingly
Having access to lots of narrow effects like this in your deck also makes your opponents spell-stealing effects much worse, on average, which is a nice bonus