2B, T, Sacrifice a blue creature, a black creature, and a red creature: Search your library for a card named Prince of Thralls, put it onto the battlefield, then shuffle.
Minion of the Mightyutility$0.29A cheap tutor/enabler creature that helps cheat a large Dragon onto the battlefield by fulfilling a specific combat or deck-building condition.
Buried Alivetutor$2.03Finds specific creatures from your library and sets up a reanimation or cheat-into-play plan, though it is not tied to a named target.
Dimir House Guardtutor$0.18Functions as a black creature-tutor via transmute, letting you search for a four-mana card by paying a similar resource cost.
Beseech the Queentutor$3.43A black-based tutor that searches your library for a key card, serving as a budget alternative to narrow creature-specific search.
Entombtutor$28.50A one-mana tutor that puts a creature directly into the graveyard for later recursion or cheat effects, analogous in speed to assembling a combo piece.
Reanimatereanimation$15.28Not a tutor, but it plays the same cheat-a-big-creature role by returning a specific creature directly to the battlefield very efficiently.
Victimizereanimation$0.45Trades a creature sacrifice for bringing creatures back directly to the battlefield, making it a similar sacrifice-to-payoff enabler in black.
Diabolic Tutortutor$1.60A straightforward black tutor that finds any card, serving as a reliable functional replacement when the exact creature-specific search is unavailable.