Flying Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)
When Divine Theurge enters, choose one — • Return target enchantment card from your graveyard to your hand. • Return target creature card with power 2 or less from your graveyard to your hand.
When Broken Spirit enters, exile target creature an opponent controls until Broken Spirit leaves the battlefield. Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)
As The Mistake enters, choose a card name. Activated abilities of sources with the chosen name can't be activated unless they're mana abilities. Unveil {5}({5}: Transform this. Unveil only as a sorcery.)
(Color indicator: Pyrus, the Undying Flame is red)
Flying, haste Whenever Pyrus, the Undying Flame attacks, add {R}{R}{R}{R}. You don't lose this mana as steps, phases, and turns end. {1}{R}: Pyrus gets +1/+0 until end of turn.
“But when his greed had reached its height, the beast he had become took flight.”
(Color indicator: Arina, Cryoshaper is blue and black)
[+1]: Tap up to one target creature. It doesn't untap during its controller's next untap step. [–2]: Exile target card from a graveyard. Create a 2/2 blue and black Elemental creature token. [–7]: You get an emblem with “You may play cards from exile.”
{U}{B}, {T}: Draw a card, then each player exiles the top card of their library. Then if a player owns two or more cards exiled with Arina, Volarian Explorer, exile her, then return her to the battlefield transformed under her owner's control.
{T}: Add {C}. {1}, {T}, Sacrifice War-Torn Tundra: Arm target creature you control. Activate only as a sorcery. (Create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to that creature.)
Raider's Den enters tapped. {T}: Add {R}. {R}, {T}: Target creature you control gains menace until end of turn. Activate only as a sorcery and only if you control a red creature.
Greenheart Den enters tapped. {T}: Add {G}. {G}, {T}: Target creature you control gets +1/+1 until end of turn. Activate only as a sorcery and only if you control a green creature.