While Bloom decks could generally tap people out with Power Sink, ensuring it was safe to go off on the following turn, Fireblast meant Justice could drop down to three land, then go find two more land and actually follow up with an Incinerate or possibly even Funeral Charm
so, pack some counterspells too
this card seems designed to go with Dreamtide Whale and Flux Channeler
Removing an opposing creature, even just for a turn, gives you a window to attack and might make your opponent blow their removal early
You gotta be prepared for Commander politics and multiple players coming after you because a 7-power Vincent, Vengeful Atoner means all your opponents are as weak as their weakest link, and they have reason to block as such
Limiting the number of cards your opponents can draw at once can really slow down their games or even shut down certain combos