No, you cannot convoke a creature with summoning sickness during your turn.
You "tap" (turn it sideways) a creature that isn't affected by summoning sickness during your attack phase to declare it as an attacker. Once all your attackers are declared, the defending player may assign blockers to them, then combat resolves and damage is dealt out simultaneously.
morning sickness
Yes, some people use airplane sickness pills to help with symptoms of motion sickness during flights.
To perform the final summoning, you have to perform all the actions, in order, that you performed during the first, second and third summoning - apart from the last step from each as the summoning symbol won't appear. Then you need to find the summon symbol for the fourth, which is behind a fallen bookcase on the same floor, in the central room with the staircase that leads upwards.
The level at which your summoning level increases your combat level all depends on the number of other combat levels you have gained during that same level. The number also depends om your current combat level, so really, there is no fixed level at which summoning will increase your combat level.
Yes, you can use creature abilities during your opponent's turn in Magic: The Gathering.
Yes, you can tap or untap a target creature during your turn in Magic: The Gathering.
Edward John Eyre had no lasting or debilitating sickness, either before, during or after he completed his explorations.
There is no specific illness you get before you are pregnant. During pregnancy you can get morning sickness, vomiting. Some get Diabetes.
Early on, sickness and disease were often blamed on supernatural forces. You might get cast out.
Yes, double strike works when a creature with double strike is blocking another creature. The creature with double strike will deal damage twice in the combat phase - first during the first strike damage step, and then again during the regular damage step.
Diptheria.