For mana values on split cards, you add together the mana value of both spells, but to avoid players having to know that, we made all five split cards meet the common requirement on one side
Room 2 Scry 1 already evaluated this at 0.5 mana
Since Battle at the Bridge gives creatures -X/-X as opposed to dealing damage, you can use it to get rid of annoying gods like Hazoret the Fervent or Rhonas the Indomitable
This extremely high amount of redundancy means the deck is highly consistent, and the commander, Nalia de'Arnise, generates some insane card advantage
It it not the consistency of making two dorks that limits how busted your Vengevine will be but rather your access to good discard outlets
So what is, exactly, going on here