here's a Set of Cards I made up myself I hope you enjoy them.

Monsters.
Monster Name-Circo Jester
level-4
Attribute-Dark
[Fiend/effect]
You can Special summon this card by Banishing another Circo Monster in you'r Hand.
ATK/1200 DEF/300

Monster name-Circo Clown
Level-4
Attribute-Dark
[Fiend/effect]
When this Card is Normal Summoned Banish another Circo Monster from you'r hand to special summon another Circo Monster from you'r hand.
ATK/1000 DEF/500

Monster name-Circo Axe-man
Level-5
Attribute-Dark
[Warrior/effect]
While attacking this Monster gains 1500 more ATK until The end of The Battle phase.
ATK/1500 DEF/1000

Monster Name-Circo Phantom
level-6
Attribute-Dark
[Fiend/effect]
One per turn you can Target one Circo Monster in you'r Banish Zone then this monsters Name,Effect,Attack and,Defense points become The same as that Monster until The end of you'r Opponent's next turn.
ATK/0 DEF/0

Monster name-Circo Colossal Clown
Level-8
Attribute-Dark
[Fiend/effect]
Once per turn you can Target One Circo Monster in you'r Banish zone and,then equipped it to this card, (Max 1)
Then this Monster gains ATK and,DEF points equal to That Monster's ATK and,DEF Points.
If this Monster would be destroyed by Battle or by a Card Effect Destroy the Monster equipped to this card instead.
ATK/2000 DEF/2500

Spells.
Spell Name-Circo Trio
Normal Spell
If you have two or more Circo Monsters on you'r side of The Field you can Special summon one Circo Monster from you'r Banish Zone in face up Defense mode.

Spell Name-Circo Funeral
Normal Spell
Target three Circo Monsters in you'r Banish zone with The same level and special summon them onto The Field,Immediately after you activate this effect use The Monsters you summoned for an Xyz Summon.

Traps.
Trap Name-Clown Scare
Counter Trap
When one of you'r Circo Monsters is targeted for an Attack you can negate The Attack and,then inflict Damage to you'r Opponent equal to The Attacking monsters ATK.

Xyz Monsters.
Monster name-Circo Ring Master
level 4
3 level 4 Circo Monsters
Attribute-Dark
[Spell-caster/Xyz/effect]
Once per turn you can Detach one Xyz Material to Target one Monster on you'r Opponents Side and,turn it into a Circo Monster until The end phase,if this Effect resolves Then take control of The Monster you Targeted until The end phase.
Once per turn if this Monster runs out of Xyz Materials you can Half you'r Life points to target 3 More Circo Monsters in you'r Banish and,then add them to this Monster as Xyz materials.
ATK/2500 DEF/1300

(We'll that's it I hope you like them )