Increases dragon's intelligence by : * Level 1 : +3% * Level 2 : +3.8% * Level 3 : +4.6% * Level 4 : +5.3% * Level 5 : +6.1% * Level 6 : +6.9% * Level 7 : +7.7% * Level 8 : * Level 9 : * Level 10 : +10%