You may not copy Kalonian Hydras ability that puts counters on it as it enters the battlefield, because that is not a trigger
All of these clauses are individual too Questing Beast doesnt need to attack to prevent damage, I just does it as default through a static ability
With that said, single-use effects are regularly used in conjunction with the constant effects, to further embellish your protection suite
While this will mostly be relevant in casual play, it's worth pointing out that if you have a Naban, Dean of Iteration on the battlefield, every Wizard that enters the battlefield will trigger Warstorm Surge, Fathom Mage, Angelic Chorus, and Purphoros, God of the Forge (among others) an additional time, which opens up an entirely different layer of deck-building potential that was missing with Panharmonicon, which only triggered abilities on artifacts and creatures
With access to green mana, you get a great package of ramp spells and creatures like Birds of Paradise, Gilded Goose, and Farseek, which are considerably better than most typical preconstructed decks
Magic Arcana - October 21, 2002 - Wayback Machine Post-Development Digest
