Can be used if your Life Points are at 2000 or below. Reveal 1 "Elemental HERO" monster in your hand. Then, add 1 "Elemental HERO" monster from your Deck to your hand with the same Type and Attribute as the monster you revealed but with a different name. This Skill can only be used once per Duel.
Because they are obsessed with trying to hoard the heroes as long as they can over us and milk them out over as many different boxes as they can as money makers. I wouldn't be surprised if koga started in a new selection box.
...What I don't get is why you mentioned LIGHT, which has a ton of obvious monsters, and not FIRE, who only has two pairs of 2 possible monsters. (Burstinatrix/Blazeman and Heat/Lady Heat), especially given only one of each pair is even worth using to begin with.
Skills that give free cards are typically at least worth considering. This isn't really any different, but it suffers from competition with skills that are probably stronger, like Wounded Hero or the newly buffed Fusion Time! I expect this skill will get buffed at some point.
Another useless skill like others... I was hoping they will give us the one which would have made Brave Neos easier to summon. This is the 4th event with Yubel and was insteresting and rewarding only the first time. At least last time we got a new character.