My favorite removal spell is Mystic Confluence
Two of the easiest upgrade paths would be to head toward a big artifact / reanimator strategy with cards like Goblin Welder, Daretti, Scrap Savant, and other huge artifact finishers like Wurmcoil Engine, or play a token- / Thopter-themed deck with the help of cards like Sai, Master Thopterist, Pia and Kiran Nalaar, and friends
Blastoise was among the original three starter Pokmon
The most important reason for this is that you're running a voltron deck with an expensive-to-cast commander with no alternative win-conditions
Its pretty cheap in terms of cost versus best-in-class spells like Wheel of Fortune and the higher mana value arguably makes it more friendly for casual play
Chart shows the price of Snubbull [Build-A-Bear] #90 at the end of each month going back as long as we have tracked the item.