Unable to cast Mystical tether with flash off of Siphon Insight
I cast a Siphon Insight, which exiled my opponent's Mystical Tether. Siphon Insight says I may cast the spell and may spend mana as though it is any color to cast it. Mystical Tether says I can cast it as though it has flash if I spend two additional mana, but arena wouldn't let me cast the spell at instant speed. Unless there is some ruling I'm unaware of, there should be no reason as to why I can't cast mystical tether at instant speed for an additional two.
1
vote
Alphamew#76608
shared this idea