If your opponent plays a high-cost Character to get around "OP04-055 Plague Rounds", bust out "OP01-070 Dracule Mihawk" or "OP04-044 Kaido" to take it down
It is completely resonable to assemble such a deck
Number 1 From the Command Zone or the 99, this girl is fantastic
When you flip it faceup is when you pay the megamorph or morph cost, and thus the time when your opponent sees what card it is
For sacrifice payoffs we've got drain with Blood Artist, make ramping sac fodder with Pawn of Ulamog, draw even more cards with Smothering Abomination, and exile the sacrificed creatures to return them later with Prowling Geistcatcher
Vehicles can help you side-step combat, and its basically a 2-mana damage doubler for a board full of 1/1s