Mm. The big challenge of these is to find a reason for it to not be just a monocoloured card. E.g. something costing : why doesn't it just cost ? There are ways to answer that, of course, which is what this challenge is asking for.

Yes, this is a challenging challenge. I don't particularly care for semi-hybrid, which makes it even harder. Hmm.

I made Upwelling's Pull.

Yeah, what Alex said. I wasn't previously convinced there WAS any niche for half-hybrid, but I've enjoyed brainstorming it.

Started with Goblin Treecrasher.

Added Thundering Boar, a different twist on Goblin Treecrasher, and Endurance Charm.

I'm going a bit wild on this challenge, I added Deus of Valor

Inspired by Jack's Endurance Charm, I created (my take on) the rest of the cycle: Subtlety Charm, Cruelty Charm, Initiative Charm, Ferocity Charm.

And one more, a half-hybrid activated ability (is that ok?) Centaur Diviner

I created Dragonspeaker's Fury, a half-hybrid instant. Dragon's fury shown in red, savagery and green shown with fight, andsarkhan's madness, the black mana, shown with self-damage.

Another try, Bloodscroll Deathmage is a Vampire who mainly embodies black through ambition, sacrifice-related abilities, and deathtouch, but also has some red characteristics in bloodthirst.

A slightly less powerful but still very useful card, Guarded Secrets could be used effectively against delve in standard.

Added Craw Baloth, the first one I made I can actually see an argument for printing, apart from maybe the charms. (Probably still not, but closer.)

­Selesnya Enfilade is my contribution to this debate.

I made Thought Siphon. The way I see it, a semihybrid card should be one that could fit into one color, or that color and a second color, but not the second color alone. Blue gets a lot of card draw and just a tiny bit of discard, while black gets a lot of discard. Black card draw always requires some kind of additional payment, though, like life or sacrificing a creature, so this effect doesn't quite fit in black on its own.

Added Order of Eladamri, then decided to do a little space fill with Shivan Catapulter and Volcano Spawn.