https://steemmonsters.com?p=battle&id=c202371861f4fbdc5cda3e1fb02f92910cf40331&ref=picciridda
With Prince Rennyn, you can defeat a player with stronger cards even if you have all the monster at lower level.
The three skills buff of the summoner your cards become more powerful than expensive cards.
https://steemmonsters.com/?p=battle&id=0ecc70ed3087d82787d21d36f809c0d73857b9e4