While biding their time, collecting Ink for the big summons, players may want to think about playing cards like Pete - Games Referee, as his ability Blow the Whistle stops opponents from playing actions until their next turn
This was the first expansion series to offer 15-card packs
Personally, I like G'raha a lot more than Y'shtola, but the deck works better with Y'shtola
It does have a steep cost to using it, though, requiring you to put two of the energies attached to Giratina VSTAR into your Lost Zone, but if you can close a game with an attack or two, it will be well worth it
Similar to how mono-black decks have used the optional looting (draw-then-discard) from Learn cards, Blood tokens can help to justify deck building with more situational cards