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The real power behind this Dragon is his enter the battlefield ability, which deals damage to each other creature that also doesn't fly and each player, with X equal to the number of Mountains you control

if the monster in the resulting Monster Card Zone attacks

Blue Flame Swordsman X FIRE Level 4 [ Warrior / Effect ] ATK 1800 DEF 1600 Once per turn, during the Battle Phase (Quick Effect): You can target 1 other Warrior monster you control

You could also count redirect spells as removal

It might actually be a little more valuable early, as were likely to get a ramp or other kind of mana acceleration spell out of the deal