Combine the -1/-1 counters with cards like Glissa Sunslayer (First Strike, Death Touch), and Massacre Girl, Known Killer (Gives all your creatures Wither), and some big creatures (Grave Titan, The Scorpion God, and Carnifex Demon), and you can amass a pretty impressive army in short order
What is an MTG Alpha Starter Deck
Use the removal suite in these colors to shrug off anything too nasty to fight
Old Gnawbone and Tiamat lead the brood, but Circle of Dreams Druid is an explosive mana dork, The Book of Exalted Deeds pumps out angels and can save you from imminent death, Teleportation Circle is a blink staple and then I get into other great cards like Lolth, Spider Queen, Xorn, Delina, Wild Mage, and Fighter Class, cards I run in a few decks each
Nasty good stuff
Drana's Silencer Dont spend much time on Drana's Silencer when flicking through your collection