Does Teemo Strategist's triggered ability deal damage separately for each hidden card revealed, or all at the same time?

Ruling: The damage is dealt all at the same time. You count the number of hidden cards revealed, then deal that total amount of damage.

Sequence:

• Choose the target unit before revealing cards
• Reveal the hidden cards
• Count the total number of hidden cards revealed
• Deal that total amount of damage to the single target

Nuances:

• The ability can only target one unit
• The target must be chosen before the revealing occurs