mtg cards like dark confidant Final Fantasy Magic: The Gathering card preview You lose life equal to its mana value. BR Dark Confidant(ish) variation :

Since Hei Bai and its tokens aren't enchantments themselves, it also gives the deck resiliency against mass-enchantment destruction

Zombie

Lets face it, this may be a rare but it doesnt see a whole lot of play

Some examples: Swords to Plowshares, Teferis Protection, Chaos Warp, Great Train Heist (or other Spree cards, you pay extra costs but can go wild), Akromas Will, Deflecting Swat, Wear/Tear, and my personal favorite, Reprieve

The other significant reason is that post-board games tend to go longer and you often do not know what cards youre digging for until the game has developed a bit e.g

Berg Strider Tap target thing when this thing comes in and it doesn't untap if