Artifact Beagalltach is the first of these, as whenever it is Special Summoned during the opponents turn, you destroy up to 2 set cards you control
Each opponent draws cards equal to the number of cards that player discarded minus one
On the other, a card that never saw much competitive viability, but which deserved its value due to the rarity of finding a copy of Alpha in near-perfect condition: Vesuvan Doppelganger, sold on February 16, 2023 for $63,000
Most creatures that allow you to tap your other creatures rely on specific creature types, but can be found in Pirates, Knights, Spirits, Spiders, and Warriors
Anje also works as an instant-speed sacrifice outlet, letting you sacrifice a creature or Blood token to make each opponent lose two life and you gain two