Forum:Number 33: Chronomaly Machu Mech And ATK ?

Okay, so I got Number 33: Chronomaly Machu Mech in a booster pack, and I'm having fun trying to consider how to use it with my other cards, though I definitely need to get more level 5 monsters or some level tweaking cards first. Anyway, my query is; if I target a monster with ATK of "?" (i.e - determined by some effect on the card), what is it's original ATK considered to be?

For example, another card I have is Endless Decay (one of the few level 5's I have), and its description states "This card's ATK becomes half the opponent's Life Points", so its current ATK is half enemy life points, but its original ATK is "?", would it be treated as having an original ATK of 0, or is it an invalid target for this ability? -- Haravikk (talk • contribs) 12:12, December 12, 2013 (UTC)