As Sanctum Prelate enters the battlefield, choose a number.
Noncreature spells with converted mana cost equal to the chosen number can't be cast.

(Transforms from Azor's Gateway.)
: Add X mana of any one color, where X is your life total.

[+1]: Draw a card, then add one mana of any color.
[−2]: Create a 4/4 red Dragon creature token with flying.
[−8]: Search your library for any number of Dragon creature cards and put them onto the battlefield. Then shuffle your library.

[+1]: Creatures you control get +1/+1 and gain haste until end of turn.
[−2]: Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn.
[−6]: Create five 4/4 red Dragon creature tokens with flying.

[0]: Reveal the top card of your library and put it into your hand. Sarkhan the Mad deals damage to himself equal to that card's converted mana cost.
[−2]: Target creature's controller sacrifices it, then that player creates a 5/5 red Dragon creature token with flying.
[−4]: Each Dragon creature you control deals damage equal to its power to target player or planeswalker.

[+2]: Sarkhan, Dragonsoul deals 1 damage to each opponent and each creature your opponents control.
[−3]: Sarkhan, Dragonsoul deals 4 damage to target player or planeswalker.
[−9]: Search your library for any number of Dragon creature cards, put them onto the battlefield, then shuffle your library.

[+1]: You may discard a card. If you do, draw a card.
[+1]: Add two mana in any combination of colors. Spend this mana only to cast Dragon spells.
[−7]: Create four 5/5 red Dragon creature tokens with flying.

[+1]: Until end of turn, Sarkhan, the Dragonspeaker becomes a legendary 4/4 red Dragon creature with flying, indestructible, and haste. (He doesn't lose loyalty while he's not a planeswalker.)
[−3]: Sarkhan, the Dragonspeaker deals 4 damage to target creature.
[−6]: You get an emblem with "At the beginning of your draw step, draw two additional cards" and "At the beginning of your end step, discard your hand."

Vigilance, haste
As Saskia the Unyielding enters the battlefield, choose a player.
Whenever a creature you control deals combat damage to a player, it deals that much damage to the chosen player.

Double strike
Savageborn Hydra enters the battlefield with X +1/+1 counters on it.
: Put a +1/+1 counter on Savageborn Hydra. Activate this ability only any time you could cast a sorcery.

Sacrifice any number of lands. Search your library for up to that many land cards, put them onto the battlefield tapped, then shuffle your library.

Flying
Whenever Scourge of Valkas or another Dragon enters the battlefield under your control, it deals X damage to any target, where X is the number of Dragons you control.
: Scourge of Valkas gets +1/+0 until end of turn.

Kicker
When you cast this spell, if it was kicked, each player loses half their life, rounded up.
Scourge of the Skyclaves's power and toughness are each equal to 20 minus the highest life total among players.

Flying
Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.)
Whenever Scourge of the Throne attacks for the first time each turn, if it's attacking the player with the most life or tied for most life, untap all attacking creatures. After this phase, there is an additional combat phase.

, : Exile any number of cards from your hand face down. Put that many cards from the top of your library into your hand. Then look at the exiled cards and put them on top of your library in any order.

Draw cards equal to the number of cards in your hand plus one. You have no maximum hand size for the rest of the game.

Kicker
When Sea Gate Stormcaller enters the battlefield, copy the next instant or sorcery spell with converted mana cost 2 or less you cast this turn when you cast it. If Sea Gate Stormcaller was kicked, copy that spell twice instead. You may choose new targets for the copies.

As Sea Gate, Reborn enters the battlefield, you may pay 3 life. If you don't, it enters the battlefield tapped.
: Add .

When Seasoned Pyromancer enters the battlefield, discard two cards, then draw two cards. For each nonland card discarded this way, create a 1/1 red Elemental creature token.
, Exile Seasoned Pyromancer from your graveyard: Create two 1/1 red Elemental creature tokens.

Return any number of cards with different converted mana costs from your graveyard to your hand. Put Seasons Past on the bottom of its owner's library.