I've really struggled with a name for this blanket. It uses a double (US terminology) crochet stitch that spikes down to a couple of rows below so because I used up yarn it became the Scrappy Spikey Blanket.

Difficulty
This blanket is written in US terminology throughout using a double crochet, ch and some front post stitches for the very top.
Yarn and Notions
I've used Stylecraft Special Double Knit yarn which works on a 4mm hook. You could change this up to an Aran/Worsted weight and use a 5mm hook
The colours used are: warm grey (border), parchment, gingerbread, gold, spice, dandelion, apple, cloud blue, turquoise, storm blue, lapis, french navy, proper purple, lavender, pale rose. As I ran out of enough to do a complete row I dropped that colour but continued in the order. If using the same yarn as I have you will need approximately 18g of yarn for each stripe.
Darning needle for sewing in those ends
Measurements
The finished blanket is 106 cm / 42 inches square but you can increase the width by adding more stitches.
The pattern is a 6 stitch repeat with an extra 7 sts chained at the start to make the first row work so just multiply upward or downward from there
Abbreviations
ch - chain
dc - double crochet
fpdc - front post double crochet
sc - single crochet
sk - skip one stitch or chain
spike - complete a long dc into two rows below in the skipped stitch
st(s) - stitch(es)
*____* - repeat instructions between
Notes
A ch1 start of a row does not count as a stitch
A ch2 at the start of a row is counted as a double crochet stitch
Turn at the end of each row
Skipping stitches/chains - on single crochet rows you skip the chain, on double crochet rows you skip the stitch
Method
Chain 199 (6 x 32 repeats plus 7)
In 4th chain from hook dc *ch, sk, dc 5* to last 3 sts, ch, sk, dc last 2
ch1, sc 2, ch1 *sc 5, ch, sk* to last 2 sts, sc
ch2, dc next *spike into the skipped chain stitch below, dc 2, ch, sk, dc 2* to last 3, spike, dc 2
ch1, sc 3 *sc 2, ch, sk, sc 3* to last 2 sts, sc 2
ch2, dc next *ch, sk, dc 2, spike, dc 2* to last 3 sts, ch, sk, dc 2
ch1, sc 2, ch, sk, *sc 6, ch, sk* to last 2 sts, sc 2
ch2, dc next *spike, dc 2, ch, sk, dc 2* to last 3 sts, spike, dc 2
ch, sc 3 *sc 2, ch, sk, sc 3* repeat to last 2 sts, sc 2
Repeat rows 5 to 8 until you have reached your desired length. Complete the last row in your border colour (warm grey for me)
Next row: *sc 5, dc into skipped stitch below* to last 5 sts, sc 5

I ran out of yarn for full rows at around 96 cm in length so switched to a grey to add a final flourish and make the blanket out to a square. If you'd like to add this to yours here are the instructions
ch2, dc all sts
ch2, dc all sts
ch2 *fpdc around dc 2 rows below, sk, dc next* to end
ch, sc all sts
ch2 *fpdc around fpdc below, sk, dc next* to end
ch, sc all sts
Repeat rows 5 and 6 four more times
Edging
Starting around the side post in the top left corner, sc, working down the side place 2 sc in each dc post to the corner, (sc, ch2, sc), working across the bottom sc in an sc, sc in a skipped stitch, repeat on the other side and across the top, ch2 and slst into the starting sc.
Next round, dc all sts, in the corners (dc 2, ch2, dc 2).
I felt this was enough but you could continue with more dc or sc rounds.

Further information and Use
I am happy for this pattern to be used for personal use and limited commercial makes for onward sale. Please credit me and this page with the pattern. I’d love to see what colourways you choose so please share either on Ravelry or social media.