Memorial to Gideon

When Memorial to Gideon enters the battlefield, search your library for a Gideon planeswalker
and put it onto the battlefield. Sacrifice it at the beginning of your next end step.
Creatures you control have first strike as long as
there is a Gideon planeswalker in your graveyard.
Creatures you control have indestructible as long
as there are two or more Gideon planeswalkers in
your graveyard.