Mono Link

Mono Link (モノリンク, Mono Rinku) is a term listed in the card text of all Resonance Monsters. It allows Resonance Monsters to use their Resonance Material to Mono Summon Mono Monsters from the Extra Deck.

A Mono Link is always written at the bottom of a monster's car text. It is written like so:

"Mono Link: 6"

In this case, this would mean that a Resonance Monster would be able to use it's material to Summon a Level 6 or lower Mono Monster from the Extra Deck. In some instances, Mono Links can have other restrictions (such as attribute or being restricted to Summoning a monster from a certain Archetype).

A Mono Link can only be used once while a Resonance Monster is on the field (even if the monster is flipped face-down).

Rulings
A Mono Link is not an actual effect, so it can still be used even if cards such as are on the field and it cannot be stopped by cards such as.