This conical egg is using the same technique as the spherical one https://www.ravelry.com/patterns/library/froggybug-spheri... published in March 2025. So far, it only fits the FroggyBug Dragon, but other winged soft toys might join the family later!
The same yarn is used to knit both the Egg and the Dragon. https://www.ravelry.com/patterns/library/froggybug-egg-an.... If you pick a thicker yarn for the Dragon and its egg, they will be bigger than mine, but in the same proportions, and the egg should still fit the Dragon and vice versa.
To make the fabric tight, I would recommand to use the “trapping the floats at each stitch” technique also described in picture in the pattern: main colour yarn on the right index, secondary colour yarn on the left index. The secondary yarn is brought all along the work, and goes down / up the right needle at each stitch.

video available here: https://www.youtube.com/shorts/BBMCjTRk6xk

Trapping the floats at each stitch makes the fabric quite stiff and thick. It also makes the fabric reversible. The design is not the same on the reverse, but is nice as well. Please note the slight tiling effect on the right side.

The egg is knit-in-the-round from the bottom. It is made of 5 identical slices, starting from the bottom with 10 stitches, increasing until the required length is reached, then decreasing slowly.
The pattern is quite easy to remember: the egg is growing in 5 phases/parts where the decreases are consistent. The new part starts when the key number of stitches is reached. Even the slot position is related to that key number.

As for most of my patterns, if you are in a hurry or a total beginner you might save this pattern for later. Combining knitting in the round with trapping the floats at each stitch is quite challenging.
For info, this egg needed 5-10 hours.