Hero of the Ashened City Level 7 DARK Pyro Effect Monster ATK/ 2600 DEF/ 2100 If "Obsidim, the Ashened City" is in the Field Zone, you can Special Summon this card (from your hand)
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The drawback, of course, is Tevals insistence on taking a toll every time you cast a spell, shaving away life equal to its mana value
That said, hes going to be really rough to play in the early game, and all game long there will be scenarios where playing him kills one or two of your creatures, and that will be particularly painful if your opponent can simply deal with Geth on their turn This proliferates twice which is definitely some serious upside in this set
The main WATER Synchro youre going into is Lancea, Dragonic Ancestor of the Ice Spirit Mountain , which can twice per turn Summon an Ice Barrier from anywhere, such as Trishula, or General Raiho, massive tempo swings which devour opposing resources or help you close out the game