Lifelink
Whenever you gain life, put a +1/+1 counter on Aerith Gainsborough.
When Aerith Gainsborough dies, put X +1/+1 counters on each legendary creature you control, where X is the number of +1/+1 counters on Aerith Gainsborough.

When Sokka enters, discard up to two cards, then draw that many cards.
Whenever you cast an artifact or Lesson spell, put a +1/+1 counter on Sokka.

Reveal the top X cards of your library. Put all land cards from among them onto the battlefield tapped and the rest on the bottom of your library in a random order.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, untap those lands.

Whenever another creature or planeswalker you control enters, you gain 1 life.
, , Discard a card: Another target creature or planeswalker you control gains hexproof until end of turn.

+1: Draw a card. Target player mills a card.
0: Target player mills ten cards.
−7: Any number of target players each draw twenty cards.

You get X (energy counters), then you may pay any amount of . Destroy each artifact, creature, and enchantment with mana value less than or equal to the amount of paid this way.

Draft this card face up.
As you draft a card, you may draft an additional card from that booster pack. If you do, put this card into that booster pack.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Destroy target creature or planeswalker. Each creature that convoked this spell connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on that creature.)

This land enters tapped unless you control a Mountain or a Forest.
: Add or .

(: Add .)

: Add .
: Add one mana of any color. Spend this mana only to cast a Ninja or Turtle spell.
, : Target Ninja or Turtle can't be blocked this turn.

: Add .
: Add or . Activate only if you control a Swamp.

Flying
When this creature enters, exile up to two target artifacts and/or enchantments.
Plainscycling (, Discard this card: Search your library for a Plains card, reveal it, put it into your hand, then shuffle.)

If you would draw a card while your library has no cards in it, you win the game instead.
+1: Target player mills two cards. Draw a card.
−8: Draw seven cards. Then if your library has no cards in it, you win the game.

Return target spell or nonland permanent an opponent controls to its owner's hand.

Whenever a creature enters, destroy it.
: Destroy this enchantment. You skip your next turn. Any player may activate this ability.

+1: Look at the top card of your library. You may reveal that card and put it into your hand. If you do, you lose life equal to its mana value.
−2: Create a 2/3 black Vampire creature token with flying and lifelink.
−7: Sorin deals 13 damage to any target. You gain 13 life.

Indestructible
As long as your devotion to red and green is less than seven, Xenagos isn't a creature.
At the beginning of combat on your turn, another target creature you control gains haste and gets +X/+X until end of turn, where X is that creature's power.

When Kogla enters, it fights up to one target creature you don't control.
Whenever Kogla attacks, destroy target artifact or enchantment defending player controls.
: Return target Human you control to its owner's hand. Kogla gains indestructible until end of turn.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
I, II, III — Create a 3/3 black Dalek artifact creature token with menace for each lore counter on Genesis of the Daleks.
IV — Target opponent faces a villainous choice — Destroy all Dalek creatures and each of your opponents loses life equal to the total power of Daleks that died this turn, or destroy all non-Dalek creatures.