Entropy

For the first time in a turn, if a player would put
a creature into play with a mana cost greater than
the number of lands they control, instead that
player exiles that creature and each player
discards a card at random. Whoever discards the
card with the smallest mana cost may put the
exiled creature into play under their control. If
that player and an opponent are tied for the
smallest mana cost, that creature remains exiled.