Domain — Creatures can't attack you unless their controller pays for each creature they control that's attacking you, where X is the number of basic land types among lands you control.

Purestrain Genestealer enters the battlefield 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.

Prevent all combat damage that would be dealt by target attacking creature this turn.

Draw a card.