Pendulum Monsters can also have Pendulum Effects, which are written in the text box between the two Scales
Poison is tracked by counters, and once a player has ten poison counters they immediately lose the game
Golgari Thug
Add a smattering of cards from these categories, or at least realize they just got better in your cube: Exalted creatures: Noble Hierarch, Sublime Archangel, Qasali Pridemage, Knight of Glory, Rafiq of the Many Battle Cry Creatures: Accorder Paladin, Goblin Wardriver, Hero of Bladehold/Oxid Ridge, Soltari Champion, Pianna, Nomad Captain, Anthems: Glorious Anthem, Spear of Heliod, Honor of the Pure, Ajani Goldmane, Elesh Norn (Okay that might be a bit of a stretch), Gavony Township, Curse of Predation, Gaeas Anthem, Miraris Wake, Mikaeus, the Lunarch, Mirror Entity, Sorin, Lord of Innistrad Overruns: Overrun, Overwhelming Stampede, Garruk Wildspeaker, Craterhoof Behemoth (Again, probably a stretch) Auras: Rancor and its bigger cousin Angelic Destiny, but I still see Griffin Guide and Elephant Guide every now and again
Plus it can retreat for free and get out of the way - a perfect early game nuisance