Added the Sigil of Elasticity, the Sigil of the Claw, and the Sigil of Winter's Breath.

src/main/java/WayofTime/bloodmagic/item/sigil/ItemSigilFrost.java

@@ -0,0 +1,20 @@
+package WayofTime.bloodmagic.item.sigil;
+
+import net.minecraft.enchantment.EnchantmentFrostWalker;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.item.ItemStack;
+import net.minecraft.world.World;
+
+public class ItemSigilFrost extends ItemSigilToggleableBase
+{
+    public ItemSigilFrost()
+    {
+        super("frost", 100);
+    }
+
+    @Override
+    public void onSigilUpdate(ItemStack stack, World world, EntityPlayer player, int itemSlot, boolean isSelected)
+    {
+        EnchantmentFrostWalker.freezeNearby(player, world, player.getPosition(), 1);
+    }
+}