For those who play commander-focused decks, dragons from Tarkir are both powerful and collectible
Of course, there are stories of this thing completely changing the game, but in general, there is usually enough enchantment removal floating around that most of the time this will probably do nothing (expect possibly draw out that enchantment removal, but you dont usually want to approach the game like that, especially in multiplayer)
Primal Vigor Primal Vigor doubles not only your token output but also your +1/+1 counter generation
The high mana cost justifies itself in a few turns with protection from flying creatures and how many Wurm tokens you get to create
However, Valgavoths ability to consistently draw you cards allows you to offset this a good bit
Enchantment - Saga Song of Freyalise (As this Saga enters and after your draw step, add a lore counter