For example, one of the most common errors I see when building a tribal deck is to simply not have enough creatures
3/3 Card Details Set Final Fantasy: Through the Ages (FCA) Rarity mythic Colors W Artist Yoshitaka Amano Collector # 2
Casting spells from the graveyard for two less is already strong, but granting Mayhem to every nonland card in your graveyard is absurd value
The flipped card has the same mana value as the unflipped card because its the same card
The colossal denizens of the deep in Magic: The Gathering occupy a strange design niche
Okay, the combo: Play the swamp, tap for B, cast Dark Ritual and Cabal Ritual (or 2 Dark Rituals), for 4 (or 5 Black Mana floating), cast Buried Alive for 3 to place Karrthus, Bladewing, and a Thrall into the graveyard