Out of nowhere, that Tuvasa that casted almost nothing and (seemingly) struggled so much with land drops was able to use Replenish to cheat a bloody Omniscience into play, and soon enough had a Commander with 21/21, flying, vigilance and indestructible. Ur-Dragon was turned into a land, Solemnity, Enchanted Evening, Damping Matrix or something similar, and a Teferi's Protection to save himself from Kozilek's annihliator effect... Luckily for me this player had no card drawing engine.