This is a scenario i had encountered yesterday.
My LP left: 600
I special summoned my laquari = atk 2100 with chariot set.
After oponnent special summoned backblast , he ended with a set card.
Next , My laquari attacked backblast and he opened shrink. Backblast def = 1400
Laquari attk = 1050 -300(from back blast effect) = 750
Thus, i suffered damage of 650 n lost the game.
However, if i were to activate GB war chariot , can the effect of backblast be negated? meaning laquari attk only cut down by shrink and backblast is destroyed by chariot.