Proxies as follows
Relicanth=temporal forces relicanth
Cape=hero cape
Scroll=heavy baton
Regigigas V star has high hp, and with hero cape, it hits and astounding 400, but its attack is lackluster. With relicanth, you can use regigigas V's attack to hit for 100+ whatever damage you've taken, confusing yourself in the process, but given the fact that even charizard ex can't one shot you, you can hit hard back. You can also akways cheren's care a gigas back and replace the cape.
The deck has trouble initiating since it needs to be damaged before it gets its one shot potential, so claydol and brute bonnet supplenent that weakness. Poison the target and sacrifice the claydol to knock out the opponents active, then a regigigas comes in with 400 health, and can likely ko anything that touches it. Which leads to favorable trades.