Not only is Colossus 2600 ATK and available pretty much first turn every duel, but he also keeps your opponent from adding cards from the deck to their hand AND he cant be destroyed by battle or card effect, as long as you can banish 1 thunder monster from your GY instead
Are There Legendary Hydra Commanders
[23] The Obsidian Flames Expansion includes a gold Charizard ex
As Blue Maiden, her Skill is "Shape of Sea", which activates when she takes battle damage and allows her to Special Summon a WATER monster from her Graveyard whose ATK is less than or equal to the damage taken
5 Mawile Sap Energy From Your Opponent Besides Mega Evolution, Mawile is one of the few Pokemon in the franchise that doesnt have any Evolutions to speak of
Ive bought from her many times, and she has such a wide variety of stuff, that Im sure youll find some things to pick up (and her costs are very reasonable as well)