Snow Killa

Snow Killa is one of the 3 biome bosses, and she can spawn ONLY after defeating Dirtskin. She can spawn with a 15% chance in the snow biome each day, or summoned manually by throwing a Snow Globe on ice (yes, you must have went through the Christmas holiday). She is considered the hardest, having 3 stages (all modes). (I meant to do 40,000 HP on the First Phase part)

Phase 1
When summoned, the snow globe will grow into a big snowman, and the fight will begin. Snow Killa will run after you (hence the AI), but randomly pause and throw 1-3 knives. Snow Killa will then run away up to 10 blocks away and stay there for 20 seconds, then charge till the nearest wall (if goes off screen, next step will happen at the moment), then repeat the charge 3 times, then go to normal melee.

Phase 2
When at 20,000 HP, Snow Killa will get a upgrade: She will have more defense and a new attack. The attack is creating a circle of snow balls with only one escape, homing in on one area (the player's original position). This will happen before going to normal melee after the charging in Phase 1. The snowballs have a 33% chance to inflict Chilled.

Phase 3
When at 10,000, Snow Killa will undergo the last phase. She will not do melee damage, and her appearance will go smaller. Knifes will fly from both sides (disappear on contact with blocks or player, bounces off monsters, homing). Snowball circles will happen every 50 seconds, and 2 charges afterwards. Defense will go down, but knife damage increases.

Drops
ONLY ONE OF THE FOLLOWING WILL DROP: EXPERT MODE ONLY:
 * Mask (14.5%)
 * Trophy (10%)
 * 20 Snowballs (100%)
 * 4 Snow (100%)
 * 40 Gold Coins
 * Sniper Rifle (50%)
 * Snow Sighter (Same Stats as Terra Blade, just Ranged) (50%)
 * Snow Killa Treasure Bag

Aftermath

 * Travelling Merchant sells Blizzard Staff for 2 Platinum Coins
 * Cactos can now spawn in the desert.

Updates

 * 1.4: Snow Killa added.
 * 1.4.8: Now respectingly drops 4 Snow on defeat. Now inflicts Chilled with the Snowball Circle attack.