Spike Double Crochet: yo, insert hook into same lace that first dc of previous 3dc block was worked, yo, draw loop through and up so as not to crush 3dc block, [yo, draw through 2 loops] twice.
Row 1: skip 3ch (count as 1dc), *1dc into each of next 3ch, skip next ch and work 1Sdc over it instead; rep from * ending 1dc into last ch, turn.
Row 2: 3ch (count as 1dc), skip 1 st, *1dc into each of next 3sts, skip next st and work 1Sdc over it instead; rep from * ending 1dc into top of tch, turn.
Repeat row 2 until you have reached your desired length.
Stitch Pattern Swatch Photos
Example of the Diagonal Spike Stitch (Click for Larger)
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