During your Main Phase, you can Tribute Summon 1 Spellcaster-Type monster in face-up Attack Position, in addition to your Normal Summon/Set. (You can only gain this effect once per turn.) If this card is sent from the field to the Graveyard: You can add 1 Spellcaster-Type Normal Monster from your Deck or Graveyard to your hand. You can only use this effect of "Legion the Fiend Jester" once per turn.
Amarylease will allow you to summon this card without tribute.
Dream Clown, Crass Clown, and Guardian Statue in a clown control deck all target monsters, which will make it ineffective against Chaos Command Magician. Though summoning it can be difficult if they ever get proper board control.
Commonly used in many decks, Relinquished can choose a monster to equip and gain their attack. Targeting Chaos Command Magician will get their effects negated, leaving them with no equipped monster and 0 attack.
Cards like Barrel Dragon, Twin-Barrel Dragon, and Dark Voltanis all targets a monster, which will be ineffective against Chaos Command Magician. This can be useful if used against Bandit Keith to farm him.
Cards that don't target a monster
The effects of Cards below don't target a monster. Their effects cannot be negated by Chaos Command Magician.
I just summoned it and the other person with a 2200 alien (a-counter stuff) monster could place a spellcounter on me anyway. He had Kaiba's empowerment thing so the mob was 2500 and mine was put on defense with 2100. It would've been destroyed anyway but during DS my def went down to 1800 anyway due to the counter.
What happened here? I thought Mobs effects would be negated on this card?
Yes. I currently have
2 chaos command magicians
2 legion of the fiend jesters
2 dream clows
2 frontier Wiseman
3 ladies of malice
2 neo the magic swordsman
1 majic jammer
1 trap Janet
1 tribute to the doomed
1 mirror force
This card is pretty badass. He can't be targeted by relinquished or dark necrofear, which is pretty useful. Additionally, stuff like sanga and the "jin's" can't use their effects against him either, or any of the "barrel" dragons. Possibly many other examples too..
It clearly has DD Warrior under cards that ignore CCM's effect.
Love this card, once I summon him I just have to be careful with mirror wall, the rest is easy, 99%winrate after sumoning him, and I say that bcs I dont remember if i ever lose with him, but anyways, makes me feel so safe once I summon him, reach plat 3 with just 1 copy with a mixed beatdown deck, almost KoG,4 wins in a row then a GK deck beat me (but he suffered)
Will get more copy wherever I ser him again in the ct
Completely owns Keith. I use 2 of these, 2 Legion, 2 Gift of the Martyr, 1 Divine Wrath, 1 Soul Exchange and 1 Cost Down. I still run Mythic Depths and I left in KSH but no Angel 07. I also use 2 HWT7W plus 1 Acid Rain and 1 Magnetic Mosquito. Last turn Piranha Army, Secret Pass, GOTM both CCM and win. I have not even come close to losing to him yet.