Lockdown Entropy

There are hundreds of blockchains out there. Hundreds of blockchains have billions of transactions. The idea is to randomly select a transaction from randomly chosen blockchain and use the hash of the transaction + passphrase as entropy to get your 12 or 24 BIP39 Mnemonic Codes.
Just remember the blockchain you choose, block number, transaction index (starting with zero) and your passphrase
I call this wallet Lockdown Entropy/BrainWallet 3.0 as it is something I thought of and designed during 2020 Covid-19 Lockdown period
and also because the entropy(and eventually private key) is locked down somewhere in the blockchains and Brainwallet because you can easily memorize (store in your brain) or visually practice it until you remember. This project is just for fun and in no way you should consider this for actual wallet. Just Play around and have fun.
USE AT YOUR OWN RISK.

I would like to thank BlockCypher team for their generous free read only apis.
Also, I would like to thank Mr. Ian Coleman for his super awesome online BIP39 Mnemonic Code Converter

Choose a seed blockchain : Bitcoin Litecoin Dogecoin Ethereum Dash

Enter a seed block number : Go

Total TXs :

You Selected transaction:
ID :
Hash :

Enter a Passphrase (Salt) :

Select Entropy for : 12 words 24 words

Pre-entropy String (Selected TX Hash + Salt) :

Your entropy :

Now, down below in Mnemonic Code Converter
Select the checkbox which says Show Entropy Details
Paste the above entropy into the textbox which says Entropy
Down more below in the textbox BIP39 Mnemonic is your (12 or 24) Mnemonic codes
Use this Mnemonic words in your wallet at your own risk
Remember what blockchain, block number, transaction index (starting with zero) and your passphrase