The Blizzard of Odd

 is a special mission, and is home to Odd Music. It is very difficult, and is only available after achieving Rank 50.

Rewards and Special Conditions
You start with 15% more money, and a free Dart Monkey that doesn't actually die. This mission is played on Normal mode.

During the mission, several effects happen. First, there is heavy snow. However, this is not normal snow. It is orange snow that is glow-in-the-dark! This orange snow nullifies all negative effects given by nighttime, and also does not give any negative effects to Bloons.

Sometimes, Odd Portals appear. They function identically to Odd Music's ability, Odd Portal, but have less RBE capability. These Odd Portals will still produce Small and Normal notes, albeit Normal notes are uncommon before Round 20.

Additionally, Bloons will sometimes have random properties in the mission. Each Bloon may have no more than 3 randomly generated properties, and the chance of Bloons having random properties increase very slightly as more orange snow accumulates.

Beating this mission gives 2500 MM and 1000000 XP on the first time, and 400 MM and 75000 XP every other time. This does not include the separate rewards given by Odd Music.

Rounds

 * 1) 3 White Bloons, 10 Pink Bloons. Then, a rush of 15 Blue Bloons.
 * 2) 25 Purple Bloons.
 * 3) 10 Zebra Bloons.
 * 4) 75 sparsely packed White Bloons. An Odd Portal will appear, releasing 200 RBE worth of Bloons.
 * 5) 1 Rainbow Bloon, then one Ceramic Bloon. The Rainbow Bloon is oddly 30% faster than normal, but its children move at normal speed.
 * 6) 5 Orange Bloons. At least 2 Orange Bloons are guaranteed to have one or more random properties.

Trivia

 * The special mission's name is a both reference to and a pun on The Wizard of Oz.