I know it's ironic for me to say this given your username, but I've always thought that what you called illuminate should be flashback on permanents, not unearth. I like the card as is, but I would have probably liked it even more if it were sacrifice instead of exile but with a higher illuminate cost and some kind of exile clause included in the keyword. But I get that you probably went with the shortest text for elegance, and I honestly can't blame you. Also, rarity is missing, but I like the idea so much that I'm voting for it anyway.
Remove all +1/+1 counters from target creature you don’t control. Put that many +1/+1 counters on target creature you control. “Oh, so you say you’re feeling strong today? Strength is so overrated... Let me take its burden off of you, on my own shoulders. Thank me later.”
—Tagisten, dark mage
MCC - Winner (6): Oct 2014, Apr Nov 2017, Jan 2018, Apr Jun 2019 || Host (15): Dec 2014, Apr Jul Aug Dec 2015, Mar Jul Aug Oct 2016, Feb Jul 2017, Jun Nov 2018, Feb Jul 2019 (last one here) || Judge (34): every month from Nov 2014 to Nov 2016 except Oct 2015, every month from Feb to Jul 2017 except Apr 2017, then Oct 2017, May Jun Nov 2018, Feb Jul 2019 (last one here) CCL - Winner (3): Jul 2016 (tied with Flatline), May 2017, Jul 2019 (last one here) || Host (5): Feb 2015, Mar Apr May Jun 2016 DCC - Winner (1): Mar 2015 (tied with Piar) || Host (3): May Oct 2015, Jan 2016
• The two public custom sets I've been part a part of the design team for: "Brotherhood of Ormos" - Blog post with all info - set thread - design skeleton / card list || "Extinctia: Homo Evanuit" - Blog post with all info - set thread - card list spreadsheet
• "The Lion's Lair", my article series about MTG and custom card design in particular. Latest article here. Here is the article index.Rather outdated by now, and based on the old MCC rubric, but I'm leaving this here for anybody that might be interested anyway.
• My only public attempt at being a writer: the story of my Leonin custom planeswalker Jeff Lionheart. (I have a very big one that I'm working on right now but that's private for now, and I don't know if I will ever actually publish it, and I also have ideas for multiple future ones, including one where I'm going to reprise Jeff.)