Paying an Action's Mana Cost

{0} - Spend zero Mana
{1} - Spend one Mana
{t} - Tap a Mana
{c} - Spend a tapped Mana
{x} - Spend all tapped Mana
When paying {x}, at least one {c} must be spent.
After Mana is tapped, if it is not spent it will
dissipate at the end of Combat.