Metamagic is a tree available exclusively for Academy heroes. Typically for this faction, the skills focus on strengthening the spells and on various magic effects. Because of that, the tree is recommended mostly for Magic heroes who will be able to use it most effectively.
On the first level you must pick Novice Metamagic, then, select the Arcane Catalyst. It's not a very useful skill, but the alternatives are even worse. As for the Expert and Master level, you should buy all skills. It will cost large amounts of skill points, but will provide great power for the spells. Grandmaster level provides a rather small bonus, you can resign from buying it and invest the spared point in any other magic school.
At the start of each round the hero receives +1 Metamagic point, up to +3 in total. Hero's Magic is strengthened by Metamagic.
Once Metamagic reaches +3, the level of all spells casted by the hero increases to Novice.
Each spell casted by hero increases the Metamagic by 1.
The first attack of the Small Pyramid in each turn increases Metamagic by 1.
At the start of each round all allied creatures receive an Arcane Shield that consumes the damage equal 2 x the number of Metamagic points.
Metamagic can increase to +5.
Once Metamagic reaches +5, the hero is casting all spells at least on Expert level.
Hero's Magic boost coming from Metamagic is doubled.
Before allied creature is hit with a melee attack for the first time, enemy creature will receive damage equal to each Metamagic point multiplied by the number of creatures in allied stack.
Metamagic can rise to +10.
Once Metamagic reaches +10, the hero casts all spells at least at Master level.
Metamagic increases the Defense and Initiative of allied creatures.
Magic damage dealt to enemy creatures is increased by 1% for each Metamagic point.