If you chose 2 as the value of X, then Clash of Wills has converted mana cost 3, and Metallurgic Summoningss ability will create a 3/3 token
(You can't use more than 1 GX attack in a game.) Weakness: Water Resistance: none Retreat: 3 Charizard-GX - Fire - 250 HP Pokmon - Stage 2 - Evolves from Charmeleon RRCC Flamethrower 140 RRCC Flare Blitz-GX 300 (You can't use more than 1 GX attack in a game.) Weakness: Water Resistance: none Retreat: 3 Charizard-GX - Fire - 250 HP Pokmon - Stage 2 - Evolves from Charmeleon CCC Wing Attack 70 RRRCC Crimson Storm 300 Discard 3 [R] Energy from this Pokmon
Previously, in cases where a card's mana value differed from the resulting spell, such as with some modal double-faced cards or cards with an Adventure, you could cast a spell with a higher mana value than the exiled card.
Its also a big flavor win, since it fits really well in a Jhoira, Weatherlight Captain deck which also cares about historic cards
Burn decks will definitely have fun playing Sunbaked Canyon, since it mitigates the all too much possible flooding
You must run this in Madness, Discard Brews or Graveyard and Reanimation too, just toss in Monument of Endurance to draw from it outside of them since you can cast what you discard with madness