Talk:Colosseum/@comment-161.253.44.240-20130509041731/@comment-187.26.174.196-20130511130221

The event doesn't change.

If you don't have the dragon of the element of a certain event, using a dragon of another element will give you small chances (or no chance at all) of getting a gold trophy, but you still have some chance of getting silver.

The point is that a Silver Trophy still gives you 50% of that dragon's cash. So, it's best to put the dragon that gives you more Cash / minute - except the opposite dragon of that event (which for Metal, it would be Plant).

From the basic level 10 dragons, you get more cash in this order: Plant (which is opposite to Metal) (111), Lightning (59), Water (55), Fire (48), Air (41), Cold (31), Earth (24), Metal (which you don't have) (19).

So, your best option would be Lightning.