Blue, Alexandrite Bone

When Blue enters the field, she enters as a 2/2 Elf Druid. Once per turn, you may choose one of the following to transform Blue into a different form, paying specified cost.
{0}: 2/2 Elf Druid
{1}: 2/2 White Wolf, gains +1+1 for each Forest you own
{2}: Bear Cavalry, Blue gains Saddle 1. Any creatures who attack while Blue is Saddled have Trample and Vigilance.
{3}: 4/4 Crocodile, Double Strike

In my defense, animal facial expressions are hard to read.