If a card or token would be put into a graveyard from anywhere, exile it instead
The trees are speaking
A land with a basic land type can't be included in your deck if that basic land type's intrinsic mana ability generates a color of mana outside of your commander's color identity
Its cheap, easy to use, and in white, filling your graveyard is something you actively want to be doing most of the time, to take advantage of whites great recursion pieces
The granted abilities effectively use "this permanent" rather than "[that card's name]," so you treat the abilities as if they were printed on the creature that gained the ability
Sure, Sarkhan can shoot something for 4 damage, but it's an incredible loss of loyalty, and I'm not sure how often I want to be using that