It was in fact Potion of Toughness! My opponent was concerned with keeping him alive (and benefiting from the "no rank bonus" special rule) and so went for the defensive option, hopeful he'd manage to cast Savage Beast for some extra damage if it came to that.
I only had 13th once, on the Power Scroll Seer. Since we've capped Power Dice at 5 per spell, the 13th suffered quite a nerf. I still had an advantage in the magic phase and the Elves not taking the Dispel Scroll was a bad idea probably. Again, my opponent figured the Book of Hoeth would be enough.
BTW, the spells were:
Seer Ruin: Warplightning, Warpgale, Death Frenzy, Scorch
Seer Plague: Wither, Bless with Filth, Plague, 13th (a great selection if you ask me!)
Warlock: Skitterleap, Warplightning
Elf High: Soul Quench, Tempest, Arcane Unforging, Flames
Elf Beasts: Wildform, Savage Beast and some other two
Turn 1.
I move up with my guys, just enough to be in range of spells and ranged weapons.
Magic is super weak (3vs2 I think) but thats just enough for me to power through
Scorch on the Eternal Guards. I kill some 14 and then
they panic and flee 11" - just off the table! Yay!
Encouraged, the missile troops open fire. First I aim the
Rocket at the Archers and kill 13, leaving just the Archmage and 2 command, Gutter Runners kill a Reaver and put 2 wounds on the Frostie, Cannon misfires harmlessly, while Mortar misses the Dragon Princes.
Storm Banner on!
Seeing the potency of my ranged attacks the Elves charge wherever they can: Dragon Princes into the Slaves, Wild Riders into the Stormvermin, Reavers into the Gutter Runners. Fliers move up very slowly. Glade Guards enter the Tower.
Magic is solid and the Archmage goes for Tempest into the massed infantry in the north. He casts it with
Irresistible Force, killing what remained of his bodyguards and wounding himself. Some 15 slaves die but the phase is over.
Shooting kills some Clanrats and the Warpfire Thrower.
In the combat phase the Wild Riders did what they to best and
butchered some 16 of my Stormvermin, as was expected. I was counting on wiping the unit with my attacks but only managed to kill 2. Still, this should be over next turn - I reform into a deeper formation to keep that rank bonus.
Dragon Princes kill 3 ranks of slaves but I hold on steadfast. We'll see if the Doomwheel mixes things up here.
The Reavers surprisingly do no damage and I wipe them out in return.
That was quite a turn with pretty much everything going my way. The Elf magic is pretty much done for, but there are some serious combat threats (DPs, WRs, Treeman, Frostie) still intact and my bodies are melting away. Will the Skaven have that famous mid-game crisis?