Witherblooms cost reduction works with X-spells
Each Kamigawa: Neon Dynasty Commander Deck set includes 1 ready-to-play deck of 100 Magic cards (2 traditional foil, 98 nonfoil), 1 foil-etched Display Commander (a thick cardstock copy of the commander card with textured foil etched into the cards border and art), 10 double-sided tokens, 1 deck box (can hold 100 sleeved cards), 1 life tracker, and 1 reference card
This is not to say you don't wind up going all in and rushing a sprint finish loads with Izzet tempo, you do, but it is a calculated choice based on the specifics of that game
Laelia's last ability will trigger that many times
The build-up on Kaima is nice because eventually it becomes a threat to knock out some commander damage kills
He's great leading a Commander deck or in the 99 with Jhoria, Weatherlight Captain in Izzet or Boros's Sram to draw cards while killing stuff