Zynga didn’t bother to update their in game instructions to explain that an ice can also be a reward in the Arena. Because there is a new element to the game, it should be explained.
Ice Season tier mastery does not grant you a badge or loot item until the season is over so don’t freak out if you don’t see the reward in your inventory. At the end, you will get the Ice Badge for whatever tier you are on when the event expires and a Manatee for whatever tier you fully mastered. The stats of this item on each level are shown below.
Along the way, you get small rewards for reaching ice milestones. They are the same ones for the previous 23 Ice Seasons.
Special thank you to Mafiawars Loot Lady for keeping us updated :).