In combination with Wrenn and Six, you even look at a recursive removal spell almost for 0 deck building costs
If that spell's mana value is 10 or greater, Zaffai, Thunder Conductor deals 10 damage to an opponent chosen at random
The Best Cards With Split Second Spells with split second tend to cost a little more mana than their more interactive equivalents, so the best ones are either mechanically unique spells or effects that you need to resolve without your opponents' interference
Doing so with a limited palette, is absurdly skilled
FINAL FANTASY X Spiraa world terrorized by the supernatural monster Sin
Concealed Courtyard, Spirebluff Canal, Blooming Marsh, Inspiring Vantage and Botanical Sanctum reprint MTGs offering of enemy fast lands - land cards that can be tapped for either of two mana colours, but enter the battlefield tapped unless you control two or fewer other lands