mtg draw card lose life What are some gain combinations in Magic the Gathering? Does an opponent lose a

I speculated on a Biolume Egg late in pack one as I began the draft in Dimir colors

You probably noticed that I called this a Drudge Skeleton and not a Blessed Orator

Green and Black are good at making tokens, so this should be a nice fit

This colorless planeswalker exiles a card on cast and can keep up this incredible removal with all the colorless spells you cast

For each of those cards, pay 4 life or put the card on top of your library. In essence, rather than drawing one card, you get to draw three then pick the one you want the most out of the bunch and keep it for free, or choose to draw more cards by paying some life

What do all of these have in common