mtg all liliana cards of the Veil Target creature gets +X/+X or Liliana of the Dark Realms

Later on your turn once you've done some life loss to your foes (which is mega-easy, and note that the Theater has that as a built-in trigger), then you'll be set and you can play any of the cards you exiled, even ones previously

Here is a rules breakdown, with Xenograft as an example

Paying 2 life to have them come in untapped helps you to stay on curve, and in decks like Death's Shadow, that life loss is actually a bonus

#7 Tales End Tales End is the Stifle for Commander players

these are to life loss what damage doublers like Solphim, Mayhem Dominus are to burn

The three we show in the art are ones Magic has done before: Loxodon (elephants), Rhox (rhinos), and Aven (birds)