Sven, Aegis for the Lost

When Sven enters the battlefield, you may search your library for a basic land card and put it into your hand. If you do, shuffle your library.
Other creatures you control with base power 3 or less gain vigilance and hexproof.
Whenever a land enters or leaves the battlefield under your control, you may put a +1/+1 counter on up to two other creature you control.