Discovered this quite by accident. If you have >1 cards in hand (and have a card to tuck of the same age as the stack you are drawing from).
First flute draw: if you would draw, first tuck a card of the same value, okay tuck a card of the same value
Second flute draw: IF the first one had a bonus, repeat the draw action, ok but before drawing first tuck the one with a bonus, hopefully draw another card with a bonus
third flute draw: etc (until you draw an echo without a bonus).
Kind if like a mini watermill without the teching up, however you can keep spamming flute over and over again and tuck all the echoes cards in that age in short order, all while splaying all your cards left. Pretty sick combo, and your opponent can't share karmas so....