Here's the original card design: Big, Bad Wolf 3GG Creature Wolf When CARDNAME enters the battlefield, exile target creature an opponent controls with a power less than CARDNAME until CARDNAME leaves the battlefield
It's colorless, it fits into every single deck, and it costs zero mana to play
$1.38 OP08-060King $1.75 OP08-063Charlotte Katakuri $1.63 OP08-067Charlotte Pudding $7.18 OP08-077Conquest of the Sea $1.75 OP08-080Queen $1.99 OP08-082Sasaki $1.98 OP08-091Whos.Who $1.25 OP08-092Page One $1.07 OP08-094Imperial Flame $0.99 OP08-109Mont Blanc Noland $1.87 OP08-110Wyper $1.50 OP08-114S-Hawk $1.27 OP08-115The Earth Will Not Lose
There are several low-effort things you can do to ensure it doesnt become a pile again
Black and green are both secondary at card drawing, both are decent at token creation (although green is a bit stronger in this department), and both are good at destructionalthough what they are capable of destroying varies between the colors (black is good at destroying creatures and land while green is good at destroying artifacts, enchantments, and land)