Forum:The Tricky discard, effect or cost?

Since there are currently no official rulings on The Tricky, I need some input on its effect. Simply, is the discard it calls for a cost or an effect? (Particularly to identify its compatibility with Dark World monsters) All logic I know tells me that it is a cost, especially comparing it against something like Dark World Lightning where the discard is a clear effect. However I'm having some doubts due to the type of effect (a Summon Effect). Further adding to the confusion is the latest edit (Dec. 20) to Card Tips:The Tricky stating: I'm not going to easily trust that statement, but its enough that I'm doubting both outcomes... What are your interpretations of its effect? --TerraGamerX 00:53, 28 December 2008 (UTC)
 * This card is excellent in a Dark World Deck as its effect triggers the effects of the dark world monsters so you get to use their special effects plus you summon a powerful monster.