As mentioned above, Courser of Kruphix itself is named in the penalty guidelines as a reason to not upgrade the penalty
SHADRIX SILVERQUILL Perhaps Im just more critical when it comes to my darling WB color combo, but just like Silverquills Deans, this Elder Dragon leaves me with mixed feelings
Whenever a creature you control attacks or blocks, it gets +X/+X until end of turn, where X is the difference between its power and toughness
Games of Magic are commonly won through combat damage, and creatures with evasion often have the edge
BPhillipYork: This would really make a green/white + anything else you want enchantment deck pop off, since early game you can use enchant lands for ramp, then drop this and cast some really expensive enchantments, truthfully though the really expensive enchantments aren't that good