Multiple blockers with first strike
&#x31;. The 6/6 will die, and the 3/3s won't take any damage.



In the first strike Combat Damage Step, both 3/3 deal three damage to the attacker. It is destroyed shortly after for having marked damage matching its toughness. The 6/6 won't be around in the normal damage Combat Damage Step to deal damage to the 3/3s, so they'll survive intact.

If the attacker was a 7/7, it would survive the first strike Combat Damage Step and a second Combat Damage Step would get created for the remaining creatures (the 7/7) to deal their damage (destroying the blockers).