When playing Hidden Blade on a unit while controlling Wraith of Echoes and Viktor Innovator, do the triggered abilities enter the chain simultaneously (allowing you to choose their order), or do they trigger at different times (fixing their order)?

Ruling: Wraith of Echoes triggers first when the unit dies, then Viktor Innovator triggers after the spell is played. They do not trigger simultaneously, so you cannot choose their order - they are finalized onto the chain in the order they became pending.

Sequence:

• Hidden Blade resolves and kills the unit
• Wraith of Echoes ability triggers and is added as a pending chain item
• Hidden Blade is sent to trash and is now considered "played"
• Viktor Innovator ability triggers and is added as a pending chain item
• Hidden Blade finishes resolving
• Both abilities are finalized onto the chain in the order they became pending (Wraith first, then Viktor)
• Viktor resolves, then Wraith resolves

Nuances:

• If the spell killing the unit is damage-based (rather than a direct kill instruction), Viktor would trigger first because the unit doesn't die until cleanup step 2, but the damage-dealing spell would already be played and Viktor would have triggered before the death occurs
• The pending chain system means triggers that might have appeared simultaneous under old rules now have a defined order based on when they become pending