Return a permanent you control to its owner's hand. Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
Choose one — • Return target artifact or enchantment card from your graveyard to your hand. • Return target creature card with mana value 2 or less from your graveyard to your hand. Cycling {2}({2}, Discard this card: Draw a card.)
(As you complete a condition, decode it. After all are decoded, you solve the mystery and transform it.) When Mystery of the Dying Herds enters, create a 0/2 white Ox creature token. A creature you control dies. You have 4 or more life than your starting life total.
[+1]: Create a 1/1 colorless Human creature token. [0]: Return target permanent card with mana value 3 or less from your graveyard to your hand. If you have an insight counter, return that permanent card to the battlefield instead. [0]: You get an insight counter. [–1]: Target creature can't attack or block until your next turn.
“Though they may talk of things like spirituality, the Leonin of Natia Valley are no more than savages crudely wearing the veneer of civilization.” —Gavis, Stalwart
Look at the top seven cards of your library. You may reveal an Avatar card and/or an enchantment card from among them and put those cards onto the battlefield. Put the rest on the bottom of your library in any order.
Choose one — • Exile target permanent you control, then return that card to the battlefield under its owner's control. • Return target permanent you control to its owner's hand. Draw a card.
Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.) [Lore I-II] You gain 1 life. [Lore III] Target creature you control gains first strike until end of turn.
Flash When Nixie's Edict enters, tap up to two target creatures. {2}{W}, Sacrifice Nixie's Edict: Put up to one target creature into its owner's library second from the top. Activate only as a sorcery.
Enchant creature Enchanted creature gets +3/+3. Whenever enchanted creature attacks, you may put a creature card with mana value 2 or less from your hand or graveyard onto the battlefield tapped and attacking.
Exile target creature. Each player gains life equal to that creature's toughness. Metamorph {W}(You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)