GreyKnightsmon (EX4-021) | SR

[When you play] ≪Devolve 1≫ one of your opponent’s Digimon. After that, until the end of your opponent’s next turn, all of your opponent’s Digimon with Lv.4 or less cannot attack.
[During each turn] When this Digimon is destroyed or returned to your hand or deck, you can play one “MetalGreymon” and one “DarkKnightmon” from this Digimon’s evolution source without paying the cost.