When it's defeated, exile it, then cast it transformed.) When Invasion of Arcavios enters the battlefield, search your library, graveyard, and/or outside the game for an instant or sorcery card you own, reveal it, and put it into your hand
Of course, Celebi was nearly impossible to actually obtain in-game save for trades or dubious hacking, but Celebis cards are far easier to find
In the early days of Magic: The Gathering's history, the upkeep step was usually reserved for paying costs associated with the eras most overpowered cards, such as Stasis and Juzam Djinn
Once Steel-types took over in the games, the TCG followed suit and gave us a true Basic version
Progenitus is a popular huge threat because protection from everything makes it very hard to answer once face up