The deck is so rigidly built around these mechanics that it feels hard to identify just one or two big upgrades to improve its power, and instead, you would need to chop and change a considerable chunk of the deck to make meaningful improvements
As a land, its difficult to interact with, so you can activate it at your leisure, once youre certain that youve locked the game up
Llanowar Tribe
[6] For example, Knight of Grace has Hexproof from black. This means that your opponent couldnt target it with Doom Blade, but they could target it with Path to Exile
Of course, in the Khans of Tarkir (2014) block there was plenty of synergies for this
At the beginning of your end step, if you havent made a suggestion, you can exile cards from your graveyard with total mana value of six or greater to make a suggestion as if youd dealt combat damage to each other player