Kel'Thuzad, Pragmatic Lich

Partner with Arthas, Misguided Passion
{u}{b}{r},{t}: Triple the amount of Level counters
on target creature.
If you control an Arthas, The Lich King, you
may transform Kel'Thuzad, Pragmatic Lich
into Frostmourne, The Runed Blade.