The mechanic is bonkers, as long as you know how it works
Triggered abilities (starting with "when," "whenever," or "at") are unaffected by Karn
The Azure Pulse ability lets you discard your hand and draw another three cards, once per turn
Bloomburrow is not a particularly strong constructed set and none of the mechanics offer a particularly good reason to maxamize them, so the set is left relying on stand alone cards
If its your first time competing in a tournament, I would definitely double-check the legality of all your cards, but otherwise, take it easy
I was impressed with the attractive conciseness of it all. The usual text box disappears when a card is put onto the playing field so they feel slightly more like their own characters than like cards, but theyre also uniquely animated based on ability