Likewise, it could be that they have a spell/trap set in their spell/trap zone, so you can place a spell/trap in that same column on your side of the field, and now theres 2 cards in that column, letting you special summon a Mekk-Knight to it On top of being able to get out strong monsters this way multiple times per turn, they have multiple effects, some of which let you move the cards on the field so that you can summon to the same zone (because the columns had 2 or more cards in them) multiple times by letting you move the card you just summoned out of the way and put a new one there
Dragons have always been an iconic part of myths and legends worldwide since as early as the Mesopotamian Empire
None of these cards are particularly valuable at this time, perhaps due to them being very new still and the Pokmon GO Charizard, despite being both very collectable and very playable can still be bought for less than 30
With all the dark energy you put into your deck, that can mean getting to the dark side of life
Most of these effects are mono-white cards, with some exceptions