Centaur's harald

[Presentjackson]

If i have {centaur's harald} in hand, can i discard it (sac it) and pay the mana for the centaur. Or is discarding not the same as sacrifice ?

[Sardok]

You can only sacrifice a permanent you control that is in play.

Discarding is putting a card in your hand into your graveyard

They are not the same.

[Pleeb]

What Sardok said. The summon centaur token ability of the herald can only be used when the herald is in play.

Summon the herald, use it as a chump blocker (vs a non-trample creature), then sac it for a 3/3 centaur token before damage is delt.