Herald of Ilharg's last ability resolves before the spell that caused it to trigger
16 hinting at some of the cards
Legendary Creature - Human Tyranid Color tag templates(None) Harmonic Prodigy Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) If a triggered ability of a Shaman or another Wizard you control triggers, that ability triggers an additional time
Theres not much of a gameplay difference between in response, Mana Leak your Tarmogoyf and end of turn, Doom Blade your Tarmogoyf, but there is a psychological delta in how it feels to the countered player
Everyone runs noncreature spells, even the Ruric Thar player, and you can only take 6 on the chin a few times before youre in the danger zone
Looking at the machines of the game: Artifacts