So if you can give a creature unblockable, or go wide enough, there isn't much your opponent will be able to do
If the enchanted creature has any subtypes other than creature types, such as Equipment, Vehicle, or Urza's, it loses those as well
Original fearsome Dinosaur commander Gishath, Suns Avatar makes a great default choice, hitting the battlefield with haste and quite likely crashing through and finding even more Dinosaurs
Giving your Garruk protection from Dreadbore can be game winning
Next up is a card I've already talked about to some degree, but one I think will be the backbone of Control decks going forward - Consult the Star Charts
In terms of reprint value, Sword of Truth and Justice is doing a lot of the heavy lifting at $35, but even then Umezawa's Jitte is around $15