spheal pokemon card full art - 199/191 - Surging Sparks Colorless Retreat Cost Spheal Card - Etsy UK

Defile Defile is a fantastic mono-black removal card

Haste + Trample Trample is a useful ability to give to a haste creature

It does require the creature to be exiled specifically with Yggdrasil, but it's easy to manipulate the top of your library so that it exiles your best creatures with its tap ability

For the purposes of this article, a cards worth or value is defined as its TCGplayer low price -10%

Combining this with the MTR's mention that drawing a card is a meaningful change, I think we can reasonably extrapolate this to any game variable changing, so a player gaining life or adding mana to their mana pool would also be a relevant change as long as the new value is likely to matter