What confounds me is that the Regent only has 3 cards that explicitly uses minions out of his full deck of 88 when his description reads:
"Heir to the Throne of Stars. Wields cosmic powers but his minions do the work."
But for whatever reason the Regent was given 5 cards that draw colorless: bundle of joy, largesse, manifest Authority, Quasar and Spectrum shift.
instead which seems a bit confusing considering Regent has a unique relic that specifically requires minions: Vitruvian Minion,
To emphasize: he only has three unique cards in his deck that actually summon minions as in: BEGONE!, CHARGE!!, AND GUARDS!!! While these cards are not bad, it doesn't make sense to me that there's only three of them given how much emphasis his character design and lore and description has on them.
Edit: Minion Tactics is a card I made as an example of a card the Regent could draw from colorless instead of random colorless cards.