I made this pillow as a Christmas gift for my best friend. I used Caron Simply Soft yarns in Sunshine and White, with a size G hook. It turned out really soft! I found the initial pattern on Ravelry by Pam Gabriel and modified it to make it larger and changed the edging a bit for aesthetic purposes.
Each of my triangles began with a 30 stitch chain, though it would have been easier to start with a chain with an odd number of stitches. A 30 stitch chain made a 6" triangle base (1' pillow), so modify the chain to make the pillow larger or smaller. I recommend having an odd number of stitches so the last few rows have the right number of stitches. I also used a modified chain start (though you can simply use whatever chain start you prefer). For a tutorial, see Fiber Doodle's blog post. Admittedly, I shouldn't have turned the piece and crocheted through the front of the initial chain, but I continued to do so for all the pieces for consistency (except the white pieces; that's why they're pointier). I wrote the method I should have used below.
Triforce Pillow PatternKey:
sc: single crochet
sc2tog: single crochet invisible decrease
Triangles - Make 6 in yellow, 2 in white or black
R1: 1 sc in 2nd ch from hook, 1 sc in each of next st to end, working in the back "hump," turn.
R2: 1 sc in each st, turn.
R3: 1 sc2tog in next 2 st, sc to second to last st, 1 sc2tog in next 2 st. (29)
R4: 1 sc in each st, turn.
R5-end: Repeat alternating R3 and R4 until only 1 stitch remains and finish off.
Crochet the two sets of triangles using whip stitch.
Edging - Make 2 in yellow
R1: 1 sc in 2nd ch from hook, working in the back "hump," turn.
R2: 1 sc in each st, turn.
R3-end: Repeat R2 until piece is the length of the side edge of two triangles.
Third Edge - Make 1 in yellow
Chain 32. R1: 1 sc in 2nd ch from hook, working in the back "hump," turn.
R2-19: 1 sc in each st.
Note: When approaching the last few rows, check the width of the edges against the other two edging pieces to make sure they'll be the same width when you stitch everything together. Increase or decrease the number of rows if necessary.
Use the whip stitch to crochet the front and back of the pillow to the edging, working the piece inside out. When almost finished, turn the piece right side out and stuff mostly full. Finish crocheting together, leaving the opening between the two ends of the edging open. Stuff through the hole and sew hole shut.
If you have any questions about this pattern, please leave a comment. I would love to see your finished products as well!
And here's a picture of me before it was finished pretending it was the long-lost Triforce Mask!