While its not quite as popular as Vivi Ornitier, Kefka has a rich competitive history, consistently topping events
Skullclamp 10/10 Most of this high rating is because the card is nuts and this effect is enhanced by having lots of small chaffy dorks in play and synergy cards you want to find
Of the 10 decks that dropped in price, the average decline was 13.2% (when including Dredge, it drops to a still respectable 10.8%), ranging from a high of 22.1% for Jund, which had multiple expensive reprints in Ultimate Masters (primarily Liliana of the Veil and Tarmogoyf), to a low of 4.3% from Hardened Scales (which didn't get many reprints at all)
Were creating a little vulnerability for ourselves here, since Vandalblast is going to be a real ouch, but the potential upside is huge
What makes the game really special is the Shandalar adventure game which gives you an excuse to keep on playing
For 7 mana I want game winning spells, and Mind's Dilation can be that but it's risky and not guaranteed