Karn, Silver Golem
Erratic Portal
Ugin's Nexus
Ultron, Artificial Malevolence
Prerequisites
What do I need to start this combo?
| Karn in your graveyard. | |
| Ugin's Nexus in hand. | |
| Erratic Portal and Ultron on the battlefield (Erratic Portal Untapped on the battlefield). | |
 each turn available |
Steps
How does this combo work?
1 | Cast Ugin's Nexus by paying  . |
2 | When Ugin's Nexus enters, Ultron triggers, causing you to pay  to create a token copy of Ugin's Nexus. |
3 | Put the token Ugin's Nexus into exile due to the legend rule and its replacement effect, causing you to take an extra turn after this one. |
4 | Activate Karn by paying  , causing Ugin's Nexus to become a creature until end of turn. |
5 | Activate Erratic Portal by paying and tapping it, choosing not to pay and return Ugin's Nexus from the battlefield to your hand. |
6 | Repeat each turn. |
Results
What do I get from this combo?
| Infinite turns | |
| Lock |
Combo Metadata
4
DECKS
0.00%
OF 1599480 ELIGIBLE DECKS
Rank 39738
MOST PLAYED OF 61737 COMBOS
{ } Commander Bracket Information
In which Commander Bracket(s) am I allowed to play this combo?
1-2
Exhibition and Core
(no 2-card combos)
Any combos that require three or more cards are allowed
3
Upgraded
(no early game 2-card combos)
Any combos that require 3 or more cards are allowed
4-5
Optimized and CEDH
(all combos are allowed)
All combos are allowed.