Scion of the Ur-Dragon, Skithiryx, the Blight Dragon, and Moltensteel Dragon

Prerequisites

• Scion of the Ur-Dragon on the battlefield
• Skithiryx, the Blight Dragon in the library
• Moltensteel Dragon in the library
• An opponent is unable to block and kill Scion of the Ur-Dragon
• , plus an additional if Scion of the Ur-Dragon has summoning sickness available

Steps

1. Activate Scion of the Ur-Dragon by paying
2. Holding priority, activate Scion of the Ur-Dragon a second time by paying
3. Resolve the first Scion of the Ur-Dragon ability, searching your library for Moltensteel Dragon, putting it into your graveyard, causing Scion of the Ur-Dragon to become a copy of Moltensteel Dragon until end of turn, and shuffling your library
4. Activate Scion of the Ur-Dragon by paying , giving itself +1/+0 until end of turn
5. Repeat step 4 five additional times
6. Resolve the Scion of the Ur-Dragon ability from step 1, searching your library for Skithiryx, putting it into your graveyard, causing Scion of the Ur-Dragon to become a copy of Skithiryx until end of turn, and shuffling your library
7. If Scion of the Ur-Dragon has summoning sickness, activate it by paying , giving it haste until end of turn
8. Deal combat damage with Scion of the Ur-Dragon, causing an opponent to get ten poison counters and lose the game due to lethal infect damage

Results

• Target opponent loses the game