I was wondering generally how Zirda, the Dawnwaker's cost reduction ability interacts with additional cost reduction that doesn't have the same restriction of not reducing it below one.
If you go to activate the cycling ability of the Triome, are you able to apply Zirda's ablitiy first, reducing it to 1, then apply Fluctuator's reducing it to 0, or do cost reductions work such that you simply can't involve Zirda's ability if the cost would be 0 in the end?
Yes, that works how you want it. When there are multiple cost reductions to apply to casting a spell or activating an ability, you can apply them in any order you'd like. So, just have the reduction from Zirda apply, then Fluctuator, and you end up with a cycling cost of 0.
Rule 601.2f: (...) Some effects may increase or reduce the cost to pay, (...) If multiple cost reductions apply, the player may apply them in any order. (...)
The specific example I have in mind involves having a Fluctuator and a Zirda, the Dawnwaker on the battlefield and a Savai Triome in hand.
If you go to activate the cycling ability of the Triome, are you able to apply Zirda's ablitiy first, reducing it to 1, then apply Fluctuator's reducing it to 0, or do cost reductions work such that you simply can't involve Zirda's ability if the cost would be 0 in the end?
Commander/EDH Decks:
BRG The Blood of Jund - Kresh the Bloodbraided BRG
WR The Blades of Goldnight - Gisela, Blade of Goldnight WR
RULES OF MAGIC :
http://magic.wizards.com/en/game-info/gameplay/rules-and-formats/rules