Mixing this powerful engine with the efficient and deadly removal and threats of the Golgari Midrange deck gives you excellent game against creature decks and aggressive decks, letting you kill things quickly and efficiently to stay alive while your late game cards come online
Myrel easily snowballs by giving you a number of soldiers equal to the amount you already have, which will be stronger on your next turn, and so on
"Dash [cost]" means "You may cast this card by paying [cost] rather than its mana cost," "If this spell's dash cost was paid, return the permanent this spell becomes to its owner's hand at the beginning of the next end step," and "As long as this permanent's dash cost was paid, it has haste." If you choose to pay the dash cost rather than the mana cost, you're still casting the spell
Because it is hilarious to watch someone swing all out for tons of combat damage and refute it all with one green, white, or black mana
These "flip planeswalkers" were hugely popular