Blue is often paired with other colors that can deal with creatures outside of the stack
Disney Lorcana already has Starter Decks, but for this format, they would follow new rules and have their own "Commanders." In the case of Disney Lorcana , there could be multiple ways to approach a similar ruling to Commander, such as using up to two characters as "Commanders," thus determining either the Ink colors of the deck or the type of characters allowed in it (i.e., Hero, Villain, Dreamborn, Floodborn, etc.)
Tyranid Swarm (green-blue-red)
You can buy singles online if you know exactly what you want, or you can roll the dice on booster packs from expansions that feature anime art
If you do then get him killed you hold back a small creature so as to be able to recur with the next guy you draw
Grist, the Hunger Tide Perhaps my favorite planeswalker of all time, Grist, the Hunger Tide fulfills two vital roles for the sacrifice deck: a sacrifice outlet, which happens to be incredibly powerful since it kills virtually anything you care about, and sacrifice fodder