(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — The next red or green creature spell you cast this turn can be cast without paying its mana cost.
II — Put three +1/+1 counters on target creature you control.
III — Choose target creature you control. Until end of turn, double its power and toughness and it gains trample.

This creature enters with a +1/+1 counter on it for each other Zombie you control and each Zombie card in your graveyard.
If this creature would be dealt damage, prevent that damage and remove a +1/+1 counter from it.

This creature can't attack unless defending player controls an Island.
, Sacrifice an Island: Target land an opponent controls becomes an Island until end of turn.
When you control no Islands, sacrifice this creature.

Draw two cards, then discard a card.

Volcanic Geyser deals X damage to any target.

: Choose a player. That player adds one mana of any color they choose.

Commander creatures you own have "Whenever one or more creatures you control deal combat damage to a player, goad target creature that player controls." (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

This land enters tapped.
: Add or .
: Until end of turn, this land becomes a 2/3 black and red Insect creature with menace. It's still a land.
Whenever this land attacks, you may discard a card. If you do, draw a card.

When this creature enters, you may sacrifice another creature. When you do, destroy target nonland permanent.

Vigilance
Whenever another creature you control leaves the battlefield without dying, put two +1/+1 counters on this creature.

Whenever a token you control leaves the battlefield, each opponent loses 1 life and you gain 1 life.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
Cycling—Pay 2 life. (Pay 2 life, Discard this card: Draw a card.)

At the beginning of your end step, if you've cast a noncreature spell this turn, reveal the top five cards of your library. For each card type among noncreature spells you've cast this turn, you may put a card of that type from among the revealed cards into your hand. Put the rest on the bottom of your library in a random order.

Destroy target nonartifact creature.

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.

Target creature gets +3/+0 and gains first strike until end of turn. (It deals combat damage before creatures without first strike.)

Artifact creatures you control have vigilance.
Whenever you cast a noncreature spell, create a 1/1 colorless Sculpture Treasure artifact creature token with ", Sacrifice this token: Add one mana of any color."

Defender, flying
: Creatures you control with defender can attack this turn as though they didn't have defender.