Taking control of all nonland permanents temporarily is usually enough to at least kill one player, and if you have some cheeky effect like Sundial of the Infinite, you can keep all the cards you took control of, essentially ending the game on the spot
Whenever you gain life, it makes an opponent lose that much life
Table of Contents show What Are Green Cards in MTG
If this list were about Draft, this card would make a strong argument for number one
24%inclusion 23%synergy 2.87K decks 12K decks Sudden Strike 24%inclusion 23%synergy 2.83K decks 11.8K decks Tangle 21%inclusion 21%synergy 2.54K decks 12K decks Double Trouble 16%inclusion 16%synergy 1.97K decks 12K decks Wisecrack 16%inclusion 15%synergy 1.87K decks 11.9K decks Terrific Team-Up 15%inclusion 14%synergy 1.74K decks 11.9K decks Secret Identity 14%inclusion 14%synergy 1.69K decks 11.9K decks Terminate 12%inclusion 8%synergy 1.44K decks 12K decks Silkguard 11%inclusion 11%synergy 1.33K decks 12K decks School Daze 10%inclusion 10%synergy 1.22K decks 11.9K decks Whoosh
Read More: The 10 Best Dwarves In Commander 10 Sludge Monster Sludge Monster is a five mana blue 5/5 that gets to put a slime counter on up to one target creature whenever it attacks or enters the battlefield