I'm just about to tackle Zkal's tower and energy potions would be reeeally handy... unfortunately, the only two potion recipes I'm missing are for energy and strength potions (and Knowledge Brew, but never mind that). These seem like fairly basic potions and only require potion-making skill levels of 3 and 4 respectively, so I'm guessing they're available fairly early on... can anyone help me remember where to find these recipes?