For multiple commands on one line, you need to insert a
| character, it's like starting a new line...
On *:TEXT:*moo*:#war-online: if ($nick != sam) { describe #war-online lixx $nick }
| else { describe #war-online smax $nick }
On *:TEXT:*moo*:#war-online: {
if ($nick != sam) { describe #war-online lixx $nick }
else { describe #war-online smax $nick }
}