Leinore puts a big target on the pilots back, drawing the opponents ire to try and stop you before you can go off with your Coven triggers
Were very certain that, in order to get packs of cards, you will have to take out your wallet at some point
Add that to its legendary status, playable strength, and absolutely killer artwork, and youve got a chase card that continues to hold long-term value in both the graded market and the TCG arena
Since Tyranitar has a lot of HP, it is easy to switch between multiple Tyranitar while healing them to prevent the opponent from taking Knock Outs
Ninjas with a low ninjutsu cost like Prosperous Thief and Ingenious Infiltrator can help you save mana for flashier game-ending spells like Kotose, the Silent Spider
Maybe some tweaking can help