Guardragon Elpy [MP20-EN021] Prismatic Secret Rare

1 Level 4 or lower Dragon monster You cannot Special Summon monsters, except Dragon monsters. During your Main Phase: You can Special Summon 1 Dragon monster from your hand or Deck to your zone that 2 or more Link Monsters point to. You can only use this effect of "Guardragon Elpy" once per turn. You can only Special Summon "Guardragon Elpy(s)" once per turn.