MTG Salvation

Thank you, but what about a scenario where one of my creatures can kill my opponents creature... so all my creatures have to block a 3/3. I have a 3/3, 4/4, 5/5 for example. Does my opponents 3/3 still make all 3 of my creatures block, or does his 3/3 die once its blocked by one of my creatures, since they have enough to kill his creature, therefore my other creatures CAN block, but dont HAVE to, because the opposing creature died already because it took 3 lethal demage.

Quick Question about Lure. So if my opponent has one creature that is a 3/3 with the 'lure' ability of "all creatures must block this creature" and I have 7 creatures of mixed stats, do all 7 of my creatures have to block? Even if I have a 1/3 as well, which should be enough to block my opponents 3/3. Also, if this is the case, do I get to choose which creature I block with first? As in, can I choose to block my opponents 3/3 with my 6/6 first, therefore saving any creatures I have that are under 3/3 from dying? Hope this makes sense and thanks in advance for any responses!