The End

This spell costs {2} less to cast if your life total is 5 or less.
Exile target creature or planeswalker. Search its controller's graveyard, hand, and library for any number of cards with the same name as that permanent and exile them. That player shuffles, then draws a card for each card exiled from their hand this way.

Wilds of Eldraine Promos

Wilds of Eldraine

If the permanent that's exiled was the back face of a double-faced card, you will not be able to exile any additional cards, because those cards have only their front-face characteristics (including name) in the graveyard, hand, and library.

The cost-reduction ability of The End doesn't change its mana cost or mana value, only the total cost you pay. Specifically, the mana value of The End is always 4.