Hatbot's official, Taishyr-approved entry approaches. Not for the faint of heart.
Final Fantasy 7
Vincent:
HP: 4595
MP: 537
Sniper CR (900 damage)
Master Magic=Magic Counterx2
Imperial Guard
Master Magic=Magic Counterx3
Touph Ring
Vincent can cast any one Master Magic spell on his own turn, and counters with five of them in succession whenever he takes damage.
Each counter is a random one out of 54 possibilities. Beneficial spells are targeted to Vincent himself.
1 - Cure, 5MP - heals 710 HP
2 - Cure2, 24MP - heals 1370 HP
3 - Cure3, 64MP - heals 3460 HP
4 - Poisona, 3MP - cures Poison
5 - Esuna, 15MP - cures status changes (not Slow)
6 - Resist, 120MP - prevents *any* status changes
7 - Life, 34MP - revival in a duel
8 - Life2, 100MP - revival in a duel
9 - Regen, 30MP - regen
10 - Fire, 4MP - 300 fire damage
11 - Fire2, 22MP - 750 fire damage
12 - Fire3, 52MP - 2400 fire damage
13 - Ice, 4MP - 300 ice damage
14 - Ice2, 22MP - 750 ice damage
15 - Ice3, 52MP - 2400 ice damage
16 - Bolt, 4MP - 300 lightning damage
17 - Bolt2, 22MP - 750 lightning damage
18 - Bolt3, 52MP - 2400 lightning damage
19 - Quake, 6MP - 410 earth damage
20 - Quake2, 28MP - 900 earth damage
21 - Quake3, 68MP - 2625 earth damage
22 - Bio, 8MP - 375 poison damage, 55% poison
23 - Bio2, 36MP - 790 poison damage, 55% poison
24 - Bio3, 80MP - 2550 poison damage, 85% poison
25 - Demi, 14MP - 25% cHP gravity damage, 75% accuracy
26 - Demi2, 33MP - 50% cHP gravity damage, 75% accuracy
27 - Demi3, 48MP - 75% cHP gravity damage, 75% accuracy
28 - Sleepel, 8MP - 85% sleep
29 - Confu, 18MP - 70% confusion
30 - Silence, 24MP - 70% silence
31 - Mini, 10MP - 85% mini
32 - Toad, 14MP - 85% frog
33 - Berserk, 28MP - 95% berserk
34 - Haste, 18MP - haste
35 - Slow, 20MP - 120% slow
36 - Stop, 34MP - 70% stop
37 - Barrier, 16MP - protect
38 - MBarrier, 24MP - shell
39 - Reflect, 30MP - reflects next 4 spells
40 - DeBarrier, 12MP - removes protect/shell/reflect/shield
41 - DeSpell, 20MP - removes positive statuses+slow/stop
42 - Death, 30MP - 50% ID
43 - Escape, 16MP - IN A DUEL!
44 - Remove, 99MP - Perfect ID, does not give gil/items
45 - Comet, 70MP - 3000 damage
46 - Comet2, 110MP - 4x1050(4200) damage
47 - Freeze, 82MP - 3560 ice damage, 80% stop
48 - Break, 86MP - 3750 earth damage, 40% petrify
49 - Tornado, 90MP - 3940 wind damage, 40% confusion
50 - Flare, 100MP - 4315 fire damage
51 - Wall, 58MP - protect+shell
52 - FullCure, 99MP - fullheal
53 - Shield, 180MP - absorbs physicals and elemental damage for a few rounds
54 - Ultima, 130MP - 3940 damage