Some players dont like when a counter spell has the ability to counter it built in, but in my experience you either get the counter, or you screw up a turns mana unless the opponent had an overabundance of mana anyway
Estrid can create auras that can enchant something, protect it from removal, and then untap with her +2
negate the attack, and if you do, destroy that targeted card
I mentioned that Warrant gave Izzet a better answer to Adanto Vanguard, but Audition might even be a step up from there, largely dependent on whether RR or UU is easier for your deck to manage (or, obviously if youre splashing white or black, but then you have other options for answering it)
The strategy is to start with Moltres and use Inferno Dance to start attaching multiple energy per turn
You Fusion Summon this monster by shuffling one Yubel monster and one Fiend type monster with 0 ATK and DEF anywhere from your board apart from the banished zone back into the graveyard