Purestrain Genestealer - Warhammer 40,000 Commander

Purestrain Genestealer enters with two +1/+1 counters on it.

Vanguard Species — Whenever Purestrain Genestealer attacks, you may remove a +1/+1 counter from it. If you do, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.