I just think Hydras are neat.
All mono-color hydras are either Green or Red, but there are multicolor hydras in more than just Gruul. There are some in Selesnya, Golgari, Simic, Jund, and Sultai. So, I decided to make a new Hydra commander using that shiny, new *Rulebreaker* ability. That way, I could put all the Hydras in the same deck without resorting to \[\[Progenitus\]\].
**Lerna, Hydra Whisperer** should be about comparable to \[\[Torgal, A Fine Hound\]\] or maybe \[\[Bugenhagen, Wise Elder\]\]. I originally had her give all Hydras Sunburst, but it felt weird putting that on a non-colorless card. I also considered Converge, but then I saw \[\[Wildgrowth Archaic\]\] and decided that this didn't need to be a keyword or ability word. Whatever you want to call the mechanic, I think that it's especially interesting for Hydras because of their {X} costs.
**Hillcrest Sentry** is probably the most basic card here. I just really like the flavor of a hydra getting to block an additional creature for each of its additional heads.
**Delta Dweller** is my attempt at a double-X cost, and it's the one that I'm least confident about. Costing patterns for unblockable creatures are a bit wonky, and \[\[The Flood of Mars\]\] has me pretty sure that this is underpowered. I like this flavor for a Blue Hydra, though, since deltas are where rivers split like Hydra heads.
**Cerberean Hydra** is repping for the Hydras *without* X costs. I wanted a Hydra that got its +1/+1 counters by paying life rather than mana, and it ended up being \[\[Souldrinker\]\] with Persist. The Persist is a big deal, though. Since +1/+1 counters and -1/-1 counters annihilate one another, you can always pay life to remove the -1/-1 counter, ensuring that it'll Persist again. If any of these is broken, it's probably this one.
**Scrapmetal Hydra** is my excuse to utilize more Junk tokens. \[\[Goldvein Hydra\]\] has me wondering if I can't get away with adding more keywords (maybe Menace?), but I decided to err on the side of caution since the Junk tokens come in untapped. \[\[Mister Gutsy\]\] is also an easy point of comparison.
I'm realizing I probably should have made a colorless Hydra too, but I didn't.