Pascal can gain Evasive easily, which is always useful
Is it better than sideboard engines? Most likely in The EPIC Storm, especially when you compare it to Diminishing Returns, Reforge the Soul, and Past in Flames (in the TES sideboard)
Idol of Oblivion is one of the best token-related draw engines in the game, and any reprint of it we can get is valuable to keep the cost down
At three mana, it also isn't very expensive to get on the field, and can go over opponents without enchantment interaction very easily
When sacrificing something as a cost, this cost could no longer be prevented and needed to be paid at the same time as the mana used to cast the spell
If either target becomes illegal before Inspired Ultimatum resolves, the other will be affected as appropriate and you'll draw five cards