From October 7th to December 3rd, official free play events for Rush Duels at official Japanese tournament stores will hand out Skill Cards in celebration of Rush Duels joining Duel Links.

These cards can only be used at this event or for casual play with friends. There is currently no plan to add Skill Cards to Rush Duel proper.

RD/SC01-JP001 Ohdou Yuuga (Yuga Ohdo)
Skill Card
[REQUIREMENT] Once per Duel, activate this Skill during your Main Phase.
[EFFECT] Send the top card of your Deck to the GY, also, if you sent a Spellcaster monster with this effect, then, you can choose 1 face-up monster you control and have it gain 1800 ATK until the end of the turn.

* Cannot be used for Deck Construction.

RD/SC01-JP002 Kamijou Tatsuhisa (Lucidian Kallister)
Skill Card
[REQUIREMENT] Once per Duel, activate this Skill during your Main Phase.
[EFFECT] Send the top card of your Deck to the GY, also, if you sent a Dragon monster with this effect, then, you can choose 1 face-up monster you control. If you chose a monster, during that turn, it can attack twice.

* Cannot be used for Deck Construction.

RD/SC01-JP003 Sougetsu Gakuto (Gavin Sogetsu)
Skill Card
[REQUIREMENT] Once per Duel, activate this Skill during your Main Phase.
[EFFECT] Send the top card of your Deck to the GY, also, if you sent a Warrior monster with this effect, then, you can choose 1 face-up monster you control. If you chose a monster, it can attack directly this turn.

* Cannot be used for Deck Construction.

RD/SC01-JP004 Kirishima Romin (Romin Kassidy)
Skill Card
[REQUIREMENT] Once per Duel, activate this Skill during your Main Phase.
[EFFECT] Send the top card of your Deck to the GY, also, if you sent a Psychic monster with this effect, then, you can choose 1 monster your opponent controls and destroy it.

* Cannot be used for Deck Construction.

Source