Aelfatava Blood Brother

When Aelfatava Blood Brother enters the
battlefield, you may search your library and
reveal a card named Aelfatava Death Brother.
Shuffle your library and put it on top.
Upthrust: Aelfatava Blood Brother gains +1/+1
and First Strike until end of turn." (Upthrust,
triggers the first time a Mountain or mono-Red
creature enters the battlefield under your control.)
"I am sworn to bleed others for my brothers."