While he does leave a way out for opponents not to lose life, in truth, your instants and sorceries should be the things keeping creatures off the board to remove the illusion of choice
DISPLACER KITTEN Any number of combo cards could have been on this list: Thoracle, Labman, Peregrine Drake, Jace, Wielder of Mysteries, to name a few
And second, it removes all abilities from those creatures
RG: Landfall Midrange I think green is pretty decisively the best color in Final Fantasy draft, and all the green archetypes are near the top of the power scale in part because of how flexibly they can blend into each other with their shared card pool and great fixing
A creature with both First Strike and Death Touch can deal damage before the opposing creature gets a chance to attack back
We have a bunch of viable 3-mana artifacts that can ramp into Ugin (and then trigger his static ability to exile an opponent's card once he's in play) but don't forget about Hedron Archive as a low cost way to jump from 4 to 6 mana (7 with your land drop)