Well, returning back to the creature 2/3 just summoned, what happens if I have priority and cast an instant that gives +1/+1 to that creature, and then, giving priority to the opponent, he/she casts Lightning Bolt in order to kill the creature counting on that it resolves before my instant (giving +1/+1 to the 2/3 creature)?
In other words, here's the order of the spells:
- Summoning of a 2/3 creature
- Priority is mine, and I cast an instant (giving +1/+1 to the 2/3 creature just summoned)
- I give priority to my opponent, and he casts a lightning bolt with the 2/3 creature as a target.
What happens? Does the Lightning Bolt kill the creature, or not? The stack is now:
- Lightning Bolt on the top
- My +1/+1 instant on the bottom