User blog comment:RaijinSenshi19/IMPORTANT RULE CHANGES FROM COROCORO/@comment-33052195-20180511165617

Btw the way, the ruling change isn’t like yugioh stuff where you can counter his counter that countered your counter, but rather that you can start multiple chains, eg your opponent attacks with everything, you cast a dragon shield, your opponent casts a spell null, chain resolves (can’t cast a spell null to null that spell null), you can just cast another dragon shield. It’s a buff to defensive cards.