If something's off, I go back and fix the table before wasting time on wrong price lookups
there are many high-Level/Rank/Link Rating Dragon monsters with high ATK (rivalled only by the Machine type) and powerful effects, and several multi-type themes have Dragon monsters as their ace, such as "Judgment Dragon" in "Lightsworn" or "Infernity Doom Dragon" in "Infernity"
You could also consider Stonjourner (121) from this set as an option, as it is another Basic Pokmon, has a solid 130 HP but also has a strong Ability, Exoskeleton , which reduces the damage it takes by 20 from attacks (including your own, though thats not relevant here)
Treasure Map is a filtering champion
If you burn your opponent with Shock first and play Muerra later, Muerra won't be on the board as you spend your fourth mana, and its expend 4 ability won't trigger that turn
It also provides important information such as the card number and copyright information