Most people run three or even two of certain legendary cards in their decks for this reason
As he stated on the official Magic: The Gathering website, hed actually designed a card game in 1982 called Five Magics, the design and mechanics of which were greatly inspired by tabletop games like Dungeons & Dragons and Cosmic Encounter
ISBN 0-7890-1544-7
(7/13/2018) If you cast a card "without paying its mana cost," you can't choose to cast it for any alternative costs, such as evoke costs
The combination of mass creature removal and a growing token army makes Toxrill incredibly difficult to play against, especially for decks reliant on creatures
The Secret Boomer History of this card is that back in the day, when casual players were terrible (unlike today, right?), we used to say things like: I am packing Swords for emergencies, and also in case I need to get rid of my Force of Nature or Lord of the Pit! I mean, you could do that, sure, but we were so worried about life we actively sought ways to play Stream of Life in our main deck