Between milling yourself, discarding a card, and sacrificing the saga, it pushes tons of cards into the graveyard to fuel your graveyard strategy, while the removal chapter gives you time to exploit those resources
2022 Pokemon Silver Tempest Team: SWSH12
The offshoot of this is that threshold mechanics that are easier to meet tend to be more Spike-friendly while the ones that are harder to do tend to play better with Timmy
Instead, the Ultimate could synnergise with Infect, as in: -8 You get an emblem with "Creatures you control get +2/+0 and are unblockable" The Ultimate you have right now is kind of lackluster and underwhelming, seeing as though those creatures don't have haste (Being a GB planeswalker, haste is kind of out of their territory anyway) and next turn it's not an almost guaranteed win
For two mana, you get to take a creature from each opponents hand and choose to cast that card for as long as Valki remains on the battlefield