Crocodile of the Crossing

A 5/4 with haste at four mana is a body built to swing immediately, and the design pays for that speed with a self-inflicted wound: the entry trigger drops a -1/-1 counter on a creature you control, targeting "you," not "any." There is no opponent to point it at and no way to decline. The default line is to eat the counter on the Crocodile itself, shrinking it to a 4/3 that still attacks the turn it arrives, which is the honest rate the card is priced around. The more interesting builds turn the tax into a payoff, parking the shrink on a creature that wants to die, a creature already carrying a +1/+1 counter to cancel out, or a token you were never attached to. Green rarely gets clean haste on a body this size, so the drawback is the lever the color pays to hold one: a beater whose speed is real but whose arrival always subtracts something small and deliberate from your own board. A deck with somewhere useful to send the counter gets a discount; a deck that just wanted a fast fatty pays full price in stats.