Summit Monster

 are a type of monsters colored light green, stored in the Outer Deck. For their Summon from the Outer Deck, you do not need any materials, like Spectrum Summons. However, you can only Summit Summon by Spell/Trap Cards that tell you to Summit Summon, like Fusion and Ritual Monsters, and on top of that, you have to allocate a number of your unused zones (be it Main Monster Zones or Spell & Trap Zones) depending on their Level, and while they are on the field, the zones you allocated cannot be used. For a Level 4 or lower monster, you "lock" 1 zone. For a Level 5 or 6 monster, you lock 2 zones. For Level 7 to 9 monster, you lock 3 zones, and for Level 10 to 12 monsters, you lock 4 zones. To pay off such a dangerous handicap, their effects are quite powerful in comparison to their Level. You can only Summit Summon once per turn.

Example

 * Nirvana Wings Dragon
 * Summon Summit