Warden cheesing

I think that the Warden could mount a wall up to 4 blocks with his arms, like he do when he crawls up out of the ground. Like this, he could follow the player within the ancient city more easily. He should be immune to fall damage up to more blocks than the player, if the player is slightly lower than him, like 8 blocks for example. Then, I think it's also great if he can dig back down on the ground to emerge closer to the player, if he encounters an obstacle like a wall or something else. To finish, à great addition for the player would be the ability to block range attack with some wool blocks