Initial Card State
- Ugin's Nexus in your graveyard.
- All other permanents on the battlefield (Birgi on the battlefield as Harnfel, Horn of Bounty).
Notable Prerequisites
- Kaya has at least two loyalty counters on it.
Mana Needed
- ({5} magic symbol)
available, with an additional ({5} magic symbol)
every fourth turn available.
Steps
- Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn.
- Activate Osgir by paying ({5} magic symbol)
, tapping it and exiling Ugin's Nexus from your graveyard, creating four token copies of Ugin's Nexus. - Put three of the Ugin's Nexus tokens into exile due to the legend rule and their replacement effects, causing you to take three extra turns after this one.
- Activate Karn's first loyalty ability by putting a loyalty counter on it, choosing to do nothing.
- Move to your next extra turn.
- Activate Kaya's first loyalty ability by putting a loyalty counter on it, giving creatures you control deathtouch until end of turn and putting a +1/+1 counter on a creature token you control.
- Repeat from step 4 one additional time.
- Activate Karn's second loyalty ability by removing two loyalty counters from it, returning Ugin's Nexus from exile to your hand.
- Activate Harnfel by discarding Ugin's Nexus.
- Move to your last extra turn.
- Repeat.
Bracket Tag
This combo has been estimated to be Ruthless (Bracket 4+).