Tyrion parries the first enemy hit against him per Close Combat phase and it has no effect. In addition, assuming Tyrion is still alive after all other attacks have been made, he may make a single extra attack of his own back against the model that he parried. This attack is in addition to those normally allowed to Tyrion and follows all of the rules for Tyrion's attacks. This has no effect on special attacks which do not use the model's Attacks characteristic (such as a Night Goblin Fanatic or a Giant).
Tyrion may re-roll any failed rolls to hit on the first turn of each close combat.
As soon as Tyrion is reduced co 1 Wound he gets a 2+ Ward save for the rest of the battle (including after the Heart has restored him, should this happen). This will replace the 4+ Ward save from the Dragon Armour of Aenarion as you can't have more than one Ward save. Note that if an attack will inflict multiple wounds, for example a cannon ball, then Tyrion will only get this special Ward save if he has already been reduced to 1 Wound before he is hit.
When fighting against a Dark Elf army, High Elves are immune to Panic
5
9
7
4
3
10
4(+1*)
1
4+(2+*)