Creatures entering don't cause abilities to trigger.

(: Add or .)
As this land enters, you may pay 2 life. If you don't, it enters tapped.

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.

Enchant creature
When this Aura enters, if enchanted creature has flying, this Aura deals 2 damage to that creature and this Aura gains "Enchanted creature loses flying."

Search your library for a land card, reveal it, put it into your hand, then shuffle.

: Add .
Channel — , Discard this card: Return target artifact, creature, enchantment, or planeswalker to its owner's hand. This ability costs less to activate for each legendary creature you control.

As Throne of Eldraine enters, choose a color.
: Add four mana of the chosen color. Spend this mana only to cast monocolored spells of that color.
, : Draw two cards. Spend only mana of the chosen color to activate this ability.

Choose one —
• Exile target player's graveyard.
• Destroy target artifact.
• Each creature deals 1 damage to its controller.

Whenever an opponent taps a land for mana, tap all lands that player controls.
If a creature an opponent controls attacks, all creatures that opponent controls attack if able.

Replicate (When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.)
Target creature you control deals damage equal to its power to target creature an opponent controls.

Until your next turn, your life total can't change and you gain protection from everything. All permanents you control phase out. (While they're phased out, they're treated as though they don't exist. They phase in before you untap during your untap step.)
Exile Teferi's Protection.

Vigilance
Other creatures you control get +2/+2.
Creatures your opponents control get -2/-2.

Flying
Whenever Treva deals combat damage to a player, you may pay . If you do, choose a color, then you gain 1 life for each permanent of that color.

(: Add .)

Target player loses 2 life and you gain 2 life.
Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Flying, trample, indestructible, haste
Other artifact creatures you control have flying, trample, indestructible, and haste.

: Add .
: Add one mana of any color. Spend this mana only to cast a legendary spell, and that spell can't be countered.

, , Discard a card: Return target creature to its owner's hand.

When Cloud enters, search your library for an Equipment card, reveal it, put it into your hand, then shuffle.
As long as Cloud is equipped, if a triggered ability of Cloud or an Equipment attached to it triggers, that ability triggers an additional time.

As long as there are four or more lore counters among Sagas you control, Tom Bombadil has hexproof and indestructible.
Whenever the final chapter ability of a Saga you control resolves, reveal cards from the top of your library until you reveal a Saga card. Put that card onto the battlefield and the rest on the bottom of your library in a random order. This ability triggers only once each turn.