Wall Trap idea

[Vlasaras]

Once per turn during your Main Phase: You can return 1 LIGHT or DARK monster you control to your Hand; Normal Summon 1 LIGHT or DARK monster from your Hand but not the same attribute of a monster returned by this effect. While this card is face-up: LIGHT and DARK monsters with the same level you control cannot be selected as an attack target except the monster with the highest ATK you currently control. During the End Phase: If you do not control both a face-up LIGHT and DARK attribute monster; destroy this card.

Its more about the visual and feel of the card, its not very good, but it could be usefull..more like annoying, MST or pretty much 80% anything ever will pop it, I even gave it a requirement if not fulfilled it will pop itself shees am I being harsh? well since I made it I would consider running it. in the end I don't make cards to make OP or meta/super strong 100% ill put it in me deck cards...I actually tried to make something new