Fix bug in debug SendOpcode command

Spotted by Laizerox,
explained by evilwow and tested by Neo.

Operator precedence: ! before >>
[12675] Implement some of the spell effects used in Yogg Saron encounter

Target limit and effect for 63744, 63745 and 63747
Target limit for 62978
Spell effect for 63030
Stacking exception for 65157 and 64775