Semi-staple

Semi-staples are cards that are splashable, and can easily be used in almost any Deck, but are not always recommended. Most semi-staple cards are considered Side Deck staples, due to their overall flexibility, thus making them common, but not exactly synergistic with most Main Deck cards.

These kinds of cards include:

Effect Monsters

 * Thunder King Rai-Oh

Spells

 * Book of Moon
 * Mind Control
 * Pot of Duality
 * Forbidden Lance

Traps

 * Bottomless Trap Hole
 * Compulsory Evacuation Device
 * Dimensional Prison
 * Fiendish Chain
 * Soul Drain
 * Torrential Tribute
 * Black Horn of Heaven
 * Vanity's Emptiness

Synchros

 * Armades, Keeper of Boundaries
 * Armory Arm
 * Orient Dragon
 * T.G. Hyper Librarian
 * Crimson Blader
 * Stardust Spark Dragon

Xyz

 * Abyss Dweller
 * Daigusto Emeral
 * Lavalval Chain
 * Leviair the Sea Dragon

Effect Monsters

 * D.D. Crow
 * Fossil Dyna Pachycephalo

Spells

 * Dimensional Fissure

Traps

 * Mind Crush
 * Overworked
 * Light-Imprisoning Mirror
 * Shadow-Imprisoning Mirror