Escape unnoticed during free study hall!

Even slip out right before lunch and strut to the front of the line like I owned the place! This cheat skill was finally mine. It'd be handy for escaping outside or hiding in the Tower, at least. But man, it guzzles mana. I'd only been invisible for a few minutes, and my mana bar was already half depleted. Not bad overall. I nodded in approval and flopped back onto the bed. 'So when do I check the others?' Flame, the A-rank evolution of Fireball. An A-rank skill you wouldn't get until at least the twentieth floor. Probably because I'd modeled it after Cheon I-ryeong's skill from the start, Fireball had launched as B-rank. It devoured mana like crazy, but the firepower was insane—and now it'd leveled up. Probably too powerful to test anywhere but a real fight. Using it in the lounge would just piss off the Tower again... Guess it's combat-only, then. And the brand-new skill: Crimson Flame Jewel. Given for completing a painting with a unique color palette, it probably referred to that time Moon and I took down the Goblin Lord—when two skills merged spontaneously. Flames trapped in a water droplet. So ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠casting it would summon flames encased in a water prison, like in that fight? Not AoE, but perfect for one-on-one boss fights. 'Unique color palette, huh... Feels like the skills I create count as paintings too.' Like, regular Fireball was a monotonous red sketch. Trap it in Moon's water barrier, give it that shimmering crimson glow, and boom—A-rank upgrade. 'At this rate, I'm debuting as a real artist.' So much to experiment with. Create skills, combine them, evolve the painting to the next level. Not easy yet, but the potential was endless. Try magic with other elements, blend them without clashing. Mix Crimson Flame Jewel with something else, and it might hit S-rank. Growth-type munchkin right here. Jackpot. Total jackpot. Even got my own custom Quest Window. Rewards on top of rewards. Any more hidgens lurking around? Wish someone would share tips like this. But then again, even I—stronger now—nearly got obliterated on the fifth floor. Most hunters who stumbled on that hidden probably died. Without Moon, I'd have been cursed helplessly, head lopped off by that moonblade. "Agu-gu! Moonie's a lucky charm!" "ヾ(｡>﹏<｡)ﾉﾞ" I flipped her over and rubbed my face on her belly. She flailed her tiny limbs. Ehehe, come here! After rolling around with Moon on the bed for a while, I finally picked up the massive magic stone I'd tossed in the corner. "Check out this beauty." Lustrous black sheen. Bigger than both my fists combined. At least B-rank—worth tens of millions. Luckily, Moon was too drained to touch it, so I got the whole thing intact. "Moon, no eating this one, okay? I'll give you something else later. Got it?" I warned her sternly and stashed it safely in my desk drawer. Hehe, sell this plus my savings, and I'm set for a good long while—no money worries. Selling it... I'll think about that later. Hey, I'm rich now? Sure, I'll make peanuts like this in my sleep later, but right now, this quenched my thirst perfectly. "Ehehehe." My brain pickled in reward dopamine, grinning like an idiot as I headed back to flop down— ding-dong— ...