Another favorite card of mine, Prophet of Kruphix, can really provide a platform for this to shine
Blue creature decks often desire equipment to give their weaker guys a bit more presence on the board and Kira has poor synergy with them which is critical in deck building
Notably, Hildibrands Adventure spell, Gentlemans Rise, triggers the decks Commander Yshtola, Nights Blessed, dealing two damage to all opponents while you gain two life
This triggers creaturefall because the card left the battlefield and returned as Ifrit, Warden of Inferno, which is also a creature
Typically the kinds of deck that want coverall counterspells also want to leave mana up to be reactive, having to tap five mana in your upkeep will make the turns following a Pact of Negation deeply uncomfortable until you have lots and lots of mana