There are 11 players on the field per team during a soccer game. Each team has 10 field players and a goalkeeper. Formations a...
Liquid oxygen is not flammable! It does however support vigorous combustion in anything even remotely flammable (like road tarmac, or human beings). That is because is is very reactive indeed. Being in liquid rather than gaseous form simply increases the concentration & availability of the element.
Unless user has Cosmic Fire Manipulation or Hell-Fire Manipulation/Holy Fire Manipulation: The Fire Triangle (Oxygen, Fuel, Heat) applies: Oxygen is needed as comburent. Sufficient lack of heat may complicate things. Some kind of fuel to burn is needed. Users can be overpowered by water, ice and/or cold.