yuri deck yugioh Neo Yuri (manga) | Yu-Gi-Oh! Wiki

However, the potential afforded by this card is so stupidly strong that all Water decks need to have it at their disposal: if you get lucky, your Water types at looking at three, four, five, or even six Energy

You have a reasonable likelihood of it sacrificing itself before you get to two 5/5s, and potentially before you get to draw any cards

The Planechase text can be distracting in normal games of Commander, but the effect of the card is great, basically giving you a big ritual effect without going down on cards

Polymerization is a type of Spell Card

The deck has good ramp and solid sweepers, including Living Death, Their Name Is Death, and Mutilate