Actarumar, Nightmaric Stalker

Indestructible
Actarumar, Nightmaric Stalker can't be blocked.
Whenever Actarumar, Nightmaric Stalker deals
combat damage to a player, you may have that
player put the top card of his or her library into
his or her graveyard. If it isn't a basic land card,
that player reveals his or her hand and discards
all cards with the same name than that card and
loses life equal to the number of cards discarded
this way.