Orion, The Eternal Champion/Swordmaiden of Orion/Colosseum of Glory

[Just Crouton]

Monsters beating each other up.

 

Orion, The Eternal Champion

You can only control 1 face-up "Orion, The Eternal Champion."
① If your opponent controls a monster with 2500 or more ATK (min. 1): You can Special Summon this card (from your hand.) ② Cannot be destroyed by battle or by card effects. ③  If this card is Summoned: You can activate 1 "Colosseum of Glory" from your hand, Deck, or Graveyard. ④ Once per turn: Face-up "Colosseum of Glory"s you control cannot be destroyed by card effects.

 

Swordmaiden of Orion

① If this card leaves the field: You can add 1 "Orion, The Eternal Champion" from your Deck or Graveyard to your hand.

 

Colosseum of Glory

① When this card is activated: Target 1 face-up monster on each side of the field with 2500 or more ATK; place 1 Battle Counter on those targets. ② Monsters with Battle Counters cannot be removed from the field, and must attack each turn if able. ③ Monsters without Battle Counters cannot attack. ④ If this card leaves the field, remove all Battle Counters from the field. ⑤ There can only be 1 face-up "Colosseum of Glory" on the field.

[Sora1499]

While I get what you were trying to do with Colosseum of Glory, as it stands people playing Burn deck or stall decks or something would just play it so that monsters can't attack.  Basically your opponent has to out it with an S/T destroyer or else the game will turn into a slog.  Maybe you should reword it so that monsters with no battle counters can't attack *only if* they control a monster with a battle counter.  And maybe make it "once per turn each player can place 1 battle counter on 1 monster they control."  Orion is ok, though I don't think he needs a searcher.  Seems a little silly to be running 6 of a really really good card.