Sort:  

That is a good idea.
I could collect more DEC (Dark Energy Crystals) (and maybe even reward cards) without having (owning) any card.
But card borrowing would be much easier with an internal (in-game) card delegation/lease market, but currently there is no internal (in-game) card delegation/lease market in Steem Monsters/Splinterlands.

The lease market is through peakmonsters.com. That's where I do all the leasing, etc. It's a project by the team behind @steempeak, but I believe they collaborated with @steemmonsters for the project, too.

The website is actually a well-developed marketplace for Steem Monsters/Splinterlands cards. You can buy cards in bulk, bid on cards for sale, and lease. They also have a pretty good block explorer for all steem monsters activities. You should check it out if you decide to go back into the game, too.

Coin Marketplace

STEEM 0.18
TRX 0.16
JST 0.031
BTC 62991.12
ETH 2685.43
USDT 1.00
SBD 2.55