Perhaps the best thing you can do with all that mana, besides dumping it into a massive Finale of Devastation, is to put all that mana into a Helix Pinnacle, which once you put 100 mana into it, you just win the game
This Temur card also casually makes snake tokens off of extra draws, so it never even needs to get into combat to be effective
For the sake of flavor some of the choices are not optimal, but are (usually budget friendly) alternatives that fit greatly the Merfolk tribal theme
tons of foils, special card treatments, and more await you inside every pack COLLECTOR BOOSTER BOX CONTENTS12 Magic: The GatheringAvatar: The Last Airbender Collector Boosters, with 15 cards in each pack
1 most popular on EDHREC (and its not remotely close)