Dorado

Dorado enters the battlefield tapped.
When Dorado enters the battlefield, you may
search your library for a Sombra spell, reveal
it, then shuffle your library and put that card
on top.
{t}: Add {u} or {b} to your mana pool.
{t}: Add {u}{b} to your mana pool. Spend this
mana only to cast Sombra spells.