Melontic's hand

As long as Melontic's Hand is on the battlefield, all creatures have defender and cannot attack even with
"This creature can attack as though it didnt have defender."
{t}: Melontic's Hand Metronizes (to Metronize, put Melontic's Hand into exile and return it to the battlefield tapped at the beginning of your end step).
Sacrifice Melontic's Hand if it is untapped at the beginning of your upkeep.