The KTK block had a novel twist: the middle set, Fate Reforged , was designed to be drafted both with the first set, Khans of Tarkir , and the third, Dragons of Tarkir (the block's storyline involves Sarkhan going back in time, and the sets represent alternate timelines)
These abilities allow Heliod to fit well in token, constellation, or pillow fort decks
It is also important to note that you dont give back the lands if Gilt-Leaf Archdruid leaves the battlefield, you keep them forever (or at least until the end of the game)
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You dont even need it on the battlefield
This could also let Simic do it without having to be RUG, but the problem there is neither of these creatures have trample, and you can remove the Ox with a single mana white spell, soooo