Lin Sivvi, Defiant Hero

{X}, {T}: Search your library for a Rebel permanent card with mana value X or less, put it onto the battlefield, then shuffle.
{3}: Put target Rebel card from your graveyard on the bottom of your library.

Secret Lair 30th Anniversary Countdown Kit

Nemesis

o
X, oc
T: Search your library for a Rebel card with converted mana cost X or less and put that card into play. Then shuffle your library.
o3: Put target Rebel card from your graveyard on the bottom of your library.

You do not have to find a Rebel card if you do not want to.