If it's consistently applying to 3+ cards per turn cycle then it's absolutely busted
Mono blue frequently empowers combo decks, such as Urza, Lord High Artificer whose commander deck power level can creep into CEDH
Its a tiny nod, but one that subtly connects the entire SOLDIER program to the +1/+1 counter ecosystem in the set
The Silver Tempest set is one of the most popular expansions in the Sword & Shield series, and for good reason
On top of that, Aurora, Dreaming Guardians three strength and five willpower pair with its two lore to make it a solid card by itself, able to likely withstand a few attacks in the early game - especially given that having Shift 3, allowing you to bring it out on top of another Aurora card for a lower ink cost, means you can have it on the field very early on