Sigil of Fate

When this leaves the arena, opt 1.

At the beginning of your action phase, destroy this.

Rulings

From the Compendium of Rathe release notes

Sigil of Fate’s first ability triggers when it leaves the arena (e.g when it is destroyed, when it is banished, etc.). You will opt 1 when this triggered effect resolves..
Tokens cease to exist when they leave the arena.
Sigil of Fate’s second ability triggered at the beginning of your action phase. You will destroy it when this triggered effect resolves.

Keyword notes

Opt X - Opt X is a keyword that allows you to look at the top X cards of your deck and put any number of them to the top or bottom of your deck in any order.

The number of cards you place on top and bottom of your deck is known to your opponent, the order of the cards are not.
You may put all of the cards on the top or all of the cards on the bottom if you so wish.
You may put all of the cards on the top or all of the cards on the bottom if you wish.

All keywords

ClassWizard

TypeToken

SubtypesAura

KeywordsOpt 1

SetsFAB, PEN