[Change] Valiantine's Day

I think the problem with the ability is that it's counter-intuitive to Paladin decks. Paladins are some of Light's most hardy monsters; having high life and generally something defensive like damage reduction, a Shield status, etc. On top of that, they're also an expensive race (Paladin Monument is better than Slime Hill Monument precisely because of that).
So basically, you have a card that makes one of the most sacable races Light has penalized whenever saced.

Is there any particular reason this is global? The other two cards have secondary abilities that only benefit you. At the very least I could see using this if the drawback was one-sided (and maybe reduced to 1/1/1 as while 1 less sac is trivial for mono, 2 and 3 less for dual and tri hurts a lot) as it's fairly easy for a monster to attack/be attacked by a Paladin and still survive to be sacrificed.