How about daily battles against the bosses you fight against in PvE? You would be able to fight them about 4 or 5 times with each battle more difficult than the last, but with better rewards.

Ex,,

Monday - Stan of Many Moons
Tuesday - Cyborg Kenny
Wednesday - The Master Ninjew
Thursday - Grand Wizard Cartman
Friday - cycle repeats

The decks they utilize will be more up to date with cards they recently added to the list (up to and including Robo Bebe.)

Other features

- each boss will have their own arena that’s from pvp

- they will also use their opening animations when they’re fought in pve.

- utilizes each character’s boss battle theme song from pve.

Ex of player vs CPU boss layout:

Boss: The Master Ninjew

Arena: Forbidden Graveyard

Easy

Deck: Pure Mystical (all Mystical cards excluding himself, contains newest cards including Hercules Clyde, Medusa Bebe, and Cupid Cartman, may also have Youth Pastor Craig and Imp Tweek as well.)

Common Lv 2
Rare Lv 1
Epic Lv 1
Legendary Lv 1

Reward - ?

Medium

Deck: Mystical/Neutral (includes PC Principal, and Mr. Hankey.)

Common Lv 3
Rare Lv 2
Epic Lv 1
Legendary Lv 1

Reward - ?

Hard

Deck: Mystical/Neutral/Fantasy (excluding himself and Kyle of the Drow Elves, includes Grand Wizard Cartman in the selection.)

Common Lv 4
Rare Lv 3
Epic Lv 2
Legendary Lv 1

Reward - ?
—————————————
Boss: Cyborg Kenny

Arena: ?

Easy

Deck: Pure Sci-Fi (all Sci-Fi cards excluding himself, contains newest cards including Visitors and Robo Bebe, may also have Bounty Hunter Kyle as well.)

Common Lv 2
Rare Lv 1
Epic Lv 1
Legendary Lv 1

Reward - ?

Medium

Deck: Sci-Fi/Neutral (includes PC Principal, and Mr. Hankey.)

Common Lv 3
Rare Lv 2
Epic Lv 1
Legendary Lv 1

Reward - ?

Hard

Deck: Sci-Fi/Neutral/Adventure (excluding himself and Inuit Kenny, includes Stan of Many Moons in the selection.)

Common Lv 4
Rare Lv 3
Epic Lv 2
Legendary Lv 1

Reward - ?
——————————————
Boss: Stan of Many Moons

Arena: Stan’s Backyard

Easy

Deck: Pure Adventure (all Adventure cards excluding himself, contains newest cards including Buccaneer Bebe)

Common Lv 2
Rare Lv 1
Epic Lv 1
Legendary Lv 1

Reward - ?

Medium

Deck: Adventure/Neutral (includes PC Principal, and Mr. Hankey.)

Common Lv 3
Rare Lv 2
Epic Lv 1
Legendary Lv 1

Reward - ?

Hard

Deck: Adventure/Neutral/Mystical (excluding himself and Poseidon Stan, includes The Master Ninjew in the selection.)

Common Lv 4
Rare Lv 3
Epic Lv 2
Legendary Lv 1

Reward - ?
——————————————
Boss: Grand Wizard Cartman

Arena: Kupa Keep

Easy

Deck: Pure Fantasy (all Fantasy cards excluding himself, contains newest cards)

Common Lv 2
Rare Lv 1
Epic Lv 1
Legendary Lv 1

Reward - ?

Medium

Deck: Fantasy/Neutral (includes PC Principal, and Mr. Hankey.)

Common Lv 4
Rare Lv 3
Epic Lv 2
Legendary Lv 2

Reward - ?

Hard

Deck: Fantasy/Neutral/Sci-Fi (excluding himself and AWESOM-O 4000, includes Cyborg Kenny in the selection.)

Common Lv 6
Rare Lv 5
Epic Lv 4
Legendary Lv 3

Reward - ?

Note: the CPUs secondary themes can also be different every day they’re fought.