How many Krenkos and Squees do we have by now, yet most rats are one-and-done
First, there was a big memory issue, especially if you cast more than one of them
Fourth Edition Foreign Black Border TypeCreature Dragon Wurm Collector Number24 Rarityrare ArtistQuinton Hoover Defender, trample When this creature blocks, it loses defender
Of course, if the first card in play explicitly causes it to become day or night it simply becomes day or night
That said, we dont have EDHREC data because no one has built yet but, and I dont think Im out of line saying this, as someone who has written a column about building EDH decks for 8 years, I think I understand how the format works to an extent and Id be delighted to make some predictions based on the cards and how they work