For example, Raffine, Scheming Seers controller draws X cards and discards X cards, putting a +1/+1 counter on a creature you control for each nonland card discarded this way
As Liliana's second loyalty ability resolves, first the player whose turn it is chooses two creatures they control, then each other player in turn order does the same, knowing the choices made before them
For two mana, the instant made it so target player couldn't cast instants, sorceries, or activated abilities requiring an activation cost
While you can still sacrifice a creature when the trigger resolves, you wont get the second ability from having exploited a creature
Instead of banning the cards, the rules team at the time issued errata on all of them that said if you played it from your hand. That has now been removed