stuff becomes ultra efficient.

If I understand it right, it would make a solution ( in terms of speed and index) from light wallets easier.

I mean for Example use EVM chain wallets to transact on hive via mother wallet ( Coustom transaction) on multisig wallet.

like wallet xyz buys splinterlands card. Transaction on hive + ownership verification.

I mean the only puzzle that would additional needed is a way to very the wallet ( like import the asymmetric cryptographic data / public keys to allow a transaction and verify it).

For basic custom transactions, it would be enough. And it would not need on the first level on hive, it could be Layer 2 operating + post into L1 via mother wallet or a public wallet).

With the customizable block explorer, it could be very efficient.