Tomas, Digosi Reanimator

At the beginning of your upkeep, you may pay {u/b}. If you do, surveil 2.
{b/g}{g/u}{u/b}, {t}: Return target creature card with converted mana cost 5 or less from your
graveyard to the battlefield. It has base power 1
and is a Zombie in addition to it other types. You
may activate this effect only if you have surveiled
two or more times this turn.
"Pitter patter, let's get at 'er."