The Casual vs Competitive Problem When considering high-end Commander, whether competitive in nature, or in name (like cEDH), I think this argument is most watertight
It's best in multi-colored decks as it will discount the spell by two mana, assuming the spell has the two colors you named in its casting cost
Clear Wing Synchro Dragon X WIND Level 7 [ Dragon / SynchroEffect ] ATK 2500 DEF 2000 1 Tuner + 1+ non-Tuner monsters Once per turn, when another Level 5 or higher monster activates its effect on the field (Quick Effect): You can negate the activation, and if you do, destroy it
This is a real plus point for those attackers with slightly awkward Energy requirements
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