Mind Seize

Mind Seize is a 100-card Commander precon from Commander 2013, released November 1, 2013. It is led by Jeleva, Nephalia's Scourge, a Grixis commander.

Jeleva, Nephalia's Scourge

Flying
When Jeleva enters, each player exiles the top X cards of their library, where X is the amount of mana spent to cast Jeleva.
Whenever Jeleva attacks, you may cast an instant or sorcery spell from among cards exiled with Jeleva without paying its mana cost.

The list runs 40 lands and 21 creatures, and its nonland cards average 3.82 mana. At today's TCGplayer prices the whole deck's cards come to about $87.63, and the most valuable is Prosperity at $8.48.