Incorrect rules interactions
I can't pay mana from Lion's Eye Diamond for Mana Leak.
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GGump#24002
shared this idea
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Rezzahan#77802
commented
You have to activate the LED before Mana Leak resolves, as a response to it. While mana abilities can be activated during the resolution of Mana Leak, LED specifically prevents that by being restricted to instant timing. Which means, you have to have priority to activate it, and no player has priority while a spell is resolving.