Ixalan

Axis of Mortality | Enchantment | | At the beginning of your upkeep, you may have two target players exchange life totals. | Bastien L. Deharme

Sunbird's Invocation | Enchantment | | Whenever you cast a spell from your hand, reveal the top X cards of your library, where X is that spell's mana value. You may cast a spell with mana value X or less from among cards revealed this way without paying its mana cost. Put the rest on the bottom of your library in a random order. | Christine Choi