The Knockback Jinx Duo (Flipendo Duo) is an advanced, more powerful and more harmful version of the basic Knockback Jinx. It is capable of throwing an opponent far distances in a shower of red sparks or a swarm of multiple blue Flipendoes in a small whirlwind; this is extremely useful in duelling, and is frequently used by relatively young duellists. Flipendo Tria is an even further strengthened variation of this spell, as the numerical suffix increases the power of a spell as the numerical value increases.