Spore Frog to fog every turn, Seal of Primordium to keep wiping out artifacts and enchantments, Pernicious Deed to keep board wiping, Plaguecrafter to keep them sacrificing creatures or Planeswalkers its strong stuff when it gets going
Whenever another nontoken creature you control dies, put a +1/+1 counter on target creature and goad (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.) it
Feel free to go after special versions here
#10 Huh, Im kinda of shocked Dobermon didn't make the cut to be honest
Consider its card type, any effects that modify when you could cast it (such as flash) and any other effects that stop you from casting it (such as from Meddling Mage's ability) to determine if and when you can do this
If you're wondering why I didn't include the Red or White Rune enchantment, it's because while they replace themselves, they don't really do enough