When she ETBs you get to discard any number of cards from your hand, then draw that many, plus one
You might not care about losing coin flips with it, given the potential damage you get from spells with higher mana values
All the complexity is still there, but it comes from combining these cards with other effects bouncing a modal land to your hand to use the other side later, searching for a creature card and being able to grab a utility landthat sort of thing
Like all creature combat-based mechanics, you have to find ways for creatures to survive and to attack
Note, Im not going to include effects like Makeshift Munitions which always deal the same amount of damage no matter the sacrificed creatures power/toughness
Rarely Play: Blackbloom Rogue Hagra Mauling is the best black MDFC, offering a way to sneak an extra removal spell into your deck in a land slot