GLaDOS

+2: Target player roll 20 sided dice 1-10 even gain 1 heath odd exile target creature 11-20 even gain 1 land odd lose 3 heath 20 summon card not pay.
+3: Create 3 2/2 turrets tokens with first strike.
-15: Use neurotoxin to have target player lose 2 damage at your opponents every upkeep until they exile 5 creatures and half of their land.