Number 109 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (6/15/2010) Training Grounds won't affect a cost that isn't the cost to activate a creature's activated ability
The set still needs to be judged by the full premium pool, not only by the single top card
Cards like Enchantress's Presence and Eidolon of Blossoms provide many draw triggers from your auras
As a symmetrical effect, Pako, Arcane Retriever also risks denying your own threats from being topdecked
Constructed : Sunpearl Kirin absolutely shines in this format
High Fae Trickster and Heliod, Radian Dawn certainly accomplish this, but Valley Floodcaller remains the best option for Standard