If left unchecked, it turns into a monster of a creature
Because Surveil puts cards in the graveyard, rather than the bottom of your library, you have access to every idea you ever Surveileven one you didnt need at the time (like Jump-start spells or a Blood Operative)
Spined Thopter Phyrexian mana is one of the most notorious mechanics in Magic history, delivering some powerful cards ever like Splinter Twin and Gitaxian Probe
As they battle, the shadowy figure reveals themself to be none other than Sabin, Edgar's brother who left the crown behind and became a monk under the tutelage of Duncan, Vargas' father
With a powerful combination of white, blue, and black cards, you can cast intricate spells, control the game, and manipulate the cards for surprise victories
This is only when you first play Elsa, but it can be devastating and game changing depending on what cards your opponent was hoping to use against you