Shade, He-Man, John C. Vs. Thanos, Silver Surfer, Odin
The Shade, He-Man and Jon Constantine have one week to prep for a two phase assassination attempt. Shade is at his most powerful and has full mastery of the shadow realm, furthermore He-Man has access to all his gear and weapons. John Constantine has access to all his relics, weapons, magics, rituals, etc.
The team gets seven days to plan together on how to first kill Thanos and silver surfer together. Then if they succeed in that assassination/fight they then get another 5 days, this time they must kill Odin.