Or you can use this defensively as an answer to removal either mass or targeted, chump blocking, or others

Card Set(s) -ONE PIECE CARD THE BEST- [PRB-01] CARD VIEW ST03-008 | C | CHARACTER Trafalgar Law Attribute Slash Block icon 1 Type The Seven Warlords of the Sea/Heart Pirates Effect [Blocker] (After your opponent declares an attack, you may rest this card to make it the new target of the attack.) Card Set(s) -ONE PIECE CARD THE BEST- [PRB-01] CARD VIEW ST03-008 | C | CHARACTER Trafalgar Law Attribute Slash Block icon 1 Type The Seven Warlords of the Sea/Heart Pirates Effect [Blocker] (After your opponent declares an attack, you may rest this card to make it the new target of the attack.) Card Set(s) -ONE PIECE CARD THE BEST- [PRB-01] CARD VIEW ST03-008 | C | CHARACTER Trafalgar Law Attribute Slash Block icon 1 Type The Seven Warlords of the Sea/Heart Pirates Effect [Blocker] (After your opponent declares an attack, you may rest this card to make it the new target of the attack.) Card Set(s) -ONE PIECE CARD THE BEST- [PRB-01] CARD VIEW ST03-013 | C | CHARACTER Boa Hancock Attribute Special Block icon 1 Type The Seven Warlords of the Sea/Kuja Pirates Effect [Blocker] (After your opponent declares an attack, you may rest this card to make it the new target of the attack.) Trigger [Trigger] Play this card

The Commander Classic 2-drop Sakura-Tribe Elder will sac for no mana to ramp you a land
Kodamas Might Giving one of your creatures +2/+2 until end of turn for a single green mana can be a nice combat trick in any deck
If you pay one mana, they only need to reveal one land until they stop milling
It can allow decks to pop-off quicker, which hopefully does the job of balancing the metagame, and not just walling out archetypes completely in the same way a card like Fury did in Modern (nuking mana dorks and other go-wide decks for no mana)