You may cast the creature later from exile.) Once Stormkeld Vanguard has become blocked, reducing the power of a creature blocking it to 2 or less won't cause it to become unblocked
Sacrifice after IV.) I - Wark - Create a 2/2 green Bird creature token with "Whenever a land you control enters, this token gets +1/+0 until end of turn." II, III, IV - Kerplunk - Creatures you control gain trample until end of turn
"MTG Marvel explained, from release date to pricing"
Cards like the above Cloudkin Seer, Mulldrifter, or ones that have to self-bounce to abuse, as they don't have abilities to merely flicker - such as Thornscape Battlemage
for now, however, why not check out the most valuable cards from Ursulas Return?
Keep the pressure on by sacrificing your expendable tokens to draw cards with Village Rites or trigger massive life swings with Bastion of Remembrance