In order to learn one of those new/combined buffs, you need to find the adequate Forgotten Scroll and double-click on it. No Spellbook required and no visit to the skill trainer.
Prophet (lvl 70) | ||
Improve Combat: Shield + Might | Crypt Guard , lvl 70, chance 1/262? | Cata of the Witch |
Improve Condition: Bless the Body + Bless the Soul | Soldier of Ancient Times, lvl 73, 1/2 hp | Sillent Valley, outside Giant's Cave |
Sillien Elder (lvl 70) | ||
Improve Magic: Empower+Magic Barrier | Crypt Preacher, lvl 72, x4hp | Catacomb of Dark Omens, first 3-4 rooms |
Improve Critical Attack: Focus+Death Whisper | Crypt Preacher, lvl 72, x4hp | Catacomb of Dark Omens, first 3-4 rooms |
Note: The http://www.l2wh.com site mentions very low drop rate for each of those items, however this is not accurate. The database was probably not initialised when the scrolls started dropping, thus it averages many months of previous update (no drops) with few weeks of current update (scrolls dropping).