How to beat/farm Vellian Crowler Lvl 50

I just got 2 level 50s in a row

i havent seen a lvl 50 once.

my first battle against lvl 50 crowler
https://cdn.discordapp.com/attachments/366687307442552835/374447693206126592/Screenshot_2017-10-30-07-24-12-836_jp.konami.duellinks.png

It's very easy with this deck

How to beat mother 🔥er!?

Chtonian polymer works really well against level 50 crowler.

How if crowler use this card ?

this deck works for lvl 50.

1 celtic guardian
1 vassal
1 union attack
1 enemy controler
1 anti magic arrow
1 secret pass
2 yata
3 good goblin housekeeping
3 spirit barrier
3 jar of greed
3 massivemorph

Never seen him at 50, what are the conditions to make him surface?

I won once with lucky first turn Ojama King using Cyber Raider + Bubbleman Balance deck. lol

Here's my deck to beat him.
Guaranteed 7k-8k Points

Fisherman/Catapult Turtle Farm

• Thunder Dragon exists to both thin your deck, and more importantly, enlarge your hand. A larger hand pairs better with Magical Mallet, or as an alt Reload. The default form of this deck does not fusion summon, so activate the effect to your heart’s content.

• Your goal is to get Spirit Barrier, Legendary Ocean, and Legendary Fisherman on the field. Reinforcements searches for Fisherman so you only need to concern yourself with Legendary Ocean and Spirit Barrier.

• Crystal Seer puts whatever card you don’t select to the bottom of your deck. Put a non trap on the bottom and don’t use Magical Mallet, Thunder Dragon, or Reload after this, as they shuffled the deck.

• Buff Up one of Crowler’s monsters to 20K+ with Massive Morph. Also, if Crowler prematurely summons his boss, you can use Massivemorph to save your hide.

• Play an unused Legendary Ocean face down to tribute summon Catapult Turtle. If you do this you will only need 5 Glossies for 8K. If you don’t, you’ll need 8.

• IMPORTANT If you use Soul Exchange, tribute summon Catapult Turtle before activating Soul Exchange.

[Options]

• If you don’t have Soul Exchange, you can replace it with Enemy Controller and a second Legendary Fisherman. Legendary Fisherman is not immune to being tributed for an Econ take even with Umi on the field.

• If you don’t have 5 Glossies, you can add polymerization to fusion summon Thunder Dragon. No Glossies are needed in this case. (Also, prismatics count as 2 Glossies, and facedown monsters do not count)