Iroh, Grand Lotus does not work with Gran-Gran
When casting spells with Iroh, Grand Lotus, cost reduction is not correctly applied. I had Gran-Gran with exactly three lessons in the graveyard, which means I should be able to cast them (at least the first one) for their flashback cost for 0. MTGA removes the spell from the graveyard before the mana cost is paid, which turns off Gran-Gran's cost reduction, making the spell cost 1, and returning it to the graveyard. Perhaps not coincidentally, the client crashed after the game ended.
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Rezzahan#77802
commented
The crash is a problem, yes. But Gran Gran sbhutting off before costs are paid is correct. The first thing that happens when casting any spell is to put it on the stack, meaning, there were only two lesson cards in the graveyard by the time costs were calculated, the third one having moved to the stack. So Gran Gran couldn't reduce it.