You get to play your opponent's deck! This is not one of those mean decks that makes your opponent lose their deck, you just simply play what they play. Giving them a sense of Deja vu.
Creature advantage comes from the ability to update your creates to whatever the best creatures are and having more of them. This ability to change comes naturally on Cryptoplasm and
Vesuvan Shapeshifter
. Copying Cryptoplasm by grants the new creature Cryptoplasm's ability to change at your upkeep.
Clever Impersonator
and Phyrexian Metamorph should be the last shape shifters to leave your hand due to there ability to copy more that just creatures.
Instant and Sorcerey advantage comes from Echo Mage and Curse of Echos. A fully leveled Echo Mage even lets you copy and play more of your opponent's instant and sorcery spells than they can. Meanwhile Curse of Echos gives you this copying for free.
Artifact advantage comes from
Clever Impersonator
and Phyrexian Metamorph potentially giving you more of the opponent's artifacts than they have.
Echantment advantage comes from
Clever Impersonator
.
Planeswalker advantage comes from
Clever Impersonator
All these advantages are increased by Mimic Vat,
Soul Foundry
, and Followed Footsteps.
Win conditions come from overpowering them with creatues, possibly after kicking a Rite of Replication. Playing more instant or sorcery spells. Or through the longevity and flexability provided by
Clever Impersonator
and Mimic Vat or
Soul Foundry
.
The Sideboard allow you adjust what you can copy more reliably based on your opponent's deck.
This deck starts by giving your opponent a sense of Deja vu, but ends by showing that you can play their deck more powerfully than they can.
If you have any suggestions to make this deck better ether in play or theme please comment.