Quote from poison counter »Having two mechanics in direct opposition within the same block is bad design. It muddies the set's theme, makes it uncomfortable for many players and makes drafting more awkward.
Quote from Voxzorz »I agree, however, I think there is room for a few utility lands that sacrifice themselves (like Horizon Canopy) if the land matters mechanic is based on the number of basics you have in play, as they won't count towards that anyways. They should not both be major themes though, as that would be too complicated.
Quote from DJK3654 »Potential library mechanics dump
Uncover N (Put the bottom N cards of your library into your graveyard, then you may put a card from your graveyard on top of your library)
Uncover N (alt) (Look at the bottom N cards of your library, then put any number of them on top of your library and the rest into your graveyard)
Accord- Reveal the top card of your library. If it shares a card type with this, (effect).
Revelation- If you have fifteen or more cards in your library less than your starting library total, (effect)
(would come with a reminder token you can put underneath the top fifteen to make it easier to track)
Ascend [cost] (You may pay [cost] and put this creature on top of your library.)
When (this creature) ascends, (effect)