Back in Shards block it fit in great as its early mana fixing was amazing for blue and countering a spell late game was also great
For example, if you discard one, youve discarded one card, not two
While there is definitely some mechanical overlap with Slivers in this capacity, Allies really made it a centerpiece of their identity, whereas Slivers generally focus on static benefits that affect all Slivers
While Vega, the Watcher feels more reserved as a spellslinger than their Izzet counterparts, thats not something thats difficult to achieve
If they go through all three packs and dont draft one, they will take a random card off the stack and add it to their deck
It is difficult to imagine playing something outside of Dimir Control with cards like this, but I will not count out an Esper possibility just yet