What does The Raven's Warning do in Magic: The Gathering?

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Create a 1/1 blue Bird creature token with flying. You gain 2 life. II — Whenever one or more creatures you control with flying deal combat damage to a player this turn, look at that player's hand and draw a card. III — You may put a card you own from outside the game on top of your library.

The Raven's Warning | Kaldheim

Rulings

You don't have to reveal the card you bring into the game via the chapter III ability.

2021-02-05 • wotc

In a casual game, a card from outside the game comes from your personal collection. In a game played under tournament rules, a card from outside the game comes from your sideboard. You may look at your sideboard at any time.

2021-02-05 • wotc

As a Saga enters the battlefield, its controller puts a lore counter on it. As your precombat main phase begins (immediately after your draw step), you put another lore counter on each Saga you control. Putting a lore counter on a Saga in either of these ways doesn't use the stack.

2021-02-05 • wotc

Each symbol on the left of a Saga's text box represents a chapter ability. A chapter ability is a triggered ability that triggers when a lore counter that is put on the Saga causes the number of lore counters on the Saga to become equal to or greater than the ability's chapter number. Chapter abilities are put onto the stack and may be responded to.

2021-02-05 • wotc

A chapter ability doesn't trigger if a lore counter is put on a Saga that already had a number of lore counters greater than or equal to that chapter's number. For example, the third lore counter put on a Saga causes the chapter III ability to trigger, but chapters I and II won't trigger again.

2021-02-05 • wotc

Once a chapter ability has triggered, the ability on the stack won't be affected if the Saga gains or loses counters, or if it leaves the battlefield.

2021-02-05 • wotc

If multiple chapter abilities trigger at the same time, their controller puts them on the stack in any order. If any of them require targets, those targets are chosen as you put the abilities on the stack, before any of those abilities resolve.

2021-02-05 • wotc

Removing lore counters won't cause a previous chapter ability to trigger. If lore counters are removed from a Saga, the appropriate chapter abilities will trigger again when the Saga receives more lore counters.

2021-02-05 • wotc

Once the number of lore counters on a Saga is greater than or equal to the greatest number among its chapter abilities, the Saga's controller sacrifices it as soon as its chapter ability has left the stack, most likely by resolving or being countered. This state-based action doesn't use the stack.

2021-02-05 • wotc

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