Sigurd, Jarl of Ravensthorpe | Time Sieve | There and Back Again

(and one other card)

At the beginning of your precombat main phase,
There and Back Again and
City of Death trigger.
Resolve the
There and Back Again trigger, putting a lore counter on it.
There and Back Again's third chapter ability and
Sigurd trigger.
Resolve the
Sigurd trigger, putting a +1/+1 counter on a creature you control.
Resolve the
There and Back Again trigger, creating a legendary 6/6 Smaug creature token and causing you to sacrifice
There and Back Again.
Resolve the
City of Death trigger, putting a lore counter on it.
City of Death's second chapter ability and
Sigurd trigger.
Resolve the
Sigurd trigger, putting a +1/+1 counter on a creature you control.
Resolve the
City of Death trigger, creating a copy of the Smaug token.
Put a Smaug token into your graveyard due to the legend rule.
When the Smaug token dies, it triggers, creating fourteen Treasure tokens.
Declare
Sigurd as an attacker.
Activate a Treasure by tapping and sacrificing it, adding ({1} magic symbol) .
Activate
Sigurd by paying ({1} magic symbol) , removing a lore counter from
City of Death.
Activate
Time Sieve by tapping it and sacrificing five Treasures, causing you to take an extra turn after this one.
Move to your next turn.
At the beginning of your precombat main phase,
City of Death triggers, putting a lore counter on it.
Repeat from step 7.