If Teemo Strategist is hidden and played during a showdown, does his ability trigger twice (once for playing from hidden and once for being declared defender)?

Ruling: With the original printed text and current core rules, the ability would trigger twice - once when played from hidden and once when declared as a defender.

Nuances:

• The card has received errata that changes this interaction
• The printed text does not explicitly say "or when I'm played from hidden"
• Under current official play, the errata'd version should be used, which would only trigger once when defending