English has lots of weird and wonderful ways to change a verb to past tense, and lots of homophones. I've found a couple of nice chains, where I alternate the two!
For example, "blow" to "blew" to "blue" to "blued".
I score my chains by the number of past tense pairs, so this is a length two chain.
Question: The longest chains I know are length three, and I know two disjoint chains of that length. The first words in both chains have something very simple in common. If you combine them together, they'll tell you how scary an enemy is.
Can you find those two chains?
Technicalities: To make a verb past tense means to move from a simple present tense verb to either a simple past or past participle verb. A homophone is a word with the same pronunciation. Spelling isn't involved, just meaning and pronunciation (homophones may have the same spelling). No past tense pairs may have the same pronunciation (thanks, @Pranay), and more generally no pronunciation may be used more than twice.
All words in my chains can be found on wiktionary, and my accent and dialect are General American.
Inspiration from this puzzle by @bhh. Thanks to @bobble for suggestions.