Koala Deck Breakdown
Main: 55
Big Shield Gardna
ATK:
100
DEF:
2600
When a Spell Card is activated that targets this face-down card (and no other cards) (Quick Effect): Change this card to face-up Defense Position, and if you do, negate the activation. If this card is attacked, change it to Attack Position at the end of the Damage Step.
Gyaku-Gire Panda
ATK:
800
DEF:
1600
Increase the ATK of this card by 500 points for each monster on your opponent's side of the field. When this card attacks with an ATK that is higher than the DEF of your opponent's Defense Position monster, inflict the difference as Battle Damage to your opponent's Life Points.
Cyber Jar
ATK:
900
DEF:
900
FLIP: Destroy all monsters on the field, then both players reveal the top 5 cards from their Decks, then Special Summon all revealed Level 4 or lower monsters in face-up Attack Position or face-down Defense Position, also add any remaining cards to their hand. (If either player has less than 5 cards in their Deck, reveal as many as possible.)
Swords of Revealing Light
After this card's activation, it remains on the field, but you must destroy it during the End Phase of your opponent's 3rd turn. When this card is activated: If your opponent controls a face-down monster, flip all monsters they control face-up. While this card is face-up on the field, your opponent's monsters cannot declare an attack.
Ceasefire
If a face-down Defense Position monster or an Effect Monster is on the field: Change all face-down Defense Position monsters on the field to face-up Defense Position (Flip monsters' effects are not activated at this time), also inflict 500 damage to your opponent for each Effect Monster on the field.
Nightmare Wheel
Activate this card by targeting 1 monster your opponent controls; it cannot attack or change its battle position. When it leaves the field, destroy this card. Once per turn, during your Standby Phase: Inflict 500 damage to your opponent. That monster must be on the field to activate and to resolve this effect.
Ring of Destruction
During your opponent's turn: Target 1 face-up monster your opponent controls whose ATK is less than or equal to their LP; destroy that face-up monster, and if you do, take damage equal to its original ATK, then inflict damage to your opponent, equal to the damage you took. You can only activate 1 "Ring of Destruction" per turn.