This land enters tapped unless you have two or more opponents.
: Add or .

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
When this creature is turned face up, destroy target artifact or enchantment.

Whenever a player taps a land for mana, if it's not that player's turn, destroy that land.

Create a token that's a copy of target artifact or creature you control, except it's an artifact in addition to its other types. It gains haste until end of turn. Sacrifice it at the beginning of the next end step.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Trample
You may cast this card from your graveyard using its mutate ability.

+2: Ugin deals 3 damage to any target.
−X: Exile each permanent with mana value X or less that's one or more colors.
−10: You gain 7 life, draw seven cards, then put up to seven permanent cards from your hand onto the battlefield.

Vigilance
If a permanent entering causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
Permanents entering don't cause abilities of permanents your opponents control to trigger.

You may play an additional land on each of your turns.
You may play lands from your graveyard.
Landfall — Whenever a land you control enters, mill a card.

Whenever a player casts their second spell each turn, you lose 1 life and create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Flash
When this creature enters, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

Target creature gets +3/+3 until end of turn.

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

: Add , , or .

Ward
Whenever you attack, look at the top six cards of your library. You may cast a spell from among them with mana value less than or equal to the greatest power among attacking creatures you control without paying its mana cost. Put the rest on the bottom of your library in a random order.

At the beginning of each opponent's upkeep, if that player has two or fewer cards in hand, this creature deals 3 damage to that player.

If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Alliance — Whenever another creature you control enters, choose one that hasn't been chosen this turn —
• Put a +1/+1 counter on this creature.
• Create a tapped Treasure token.
• You gain 2 life.

Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)

At the beginning of your draw step, you may draw two additional cards. If you do, choose two cards in your hand drawn this turn. For each of those cards, pay 4 life or put the card on top of your library.

(As this Saga enters and after your draw step, add a lore counter.)
I — For each opponent, up to one target noncreature artifact they control becomes a 0/4 Wall artifact creature with defender for as long as you control this Saga.
II — Create a 3/3 green Dinosaur creature token with trample. It gains haste until end of turn.
III — Destroy all Walls. Exile this Saga, then return it to the battlefield transformed under your control.