Filling your graveyard with Surveil on top of regular spellcasting, it's easy to quickly load your graveyard to unleash a devastating amount of damage while whittling away your opponents' creatures
She can either serve as mana ramp, creature removal, or, if you save up for her ultimate ability, you can deal 5 damage to any target every time you cast a spell, which is bound to win you the game quickly
Witherbloom Pestilence Another offering from Secrets of Strixhaven, Witherbloom Pestilence is all about sacrificng cards to power up other creatures, and in Dina, Essence Brewer, it has a one-card engine to do both with relative ease
But the fact you get more powerful versions of it if you have the spare mana is really nice
Niko is certainly more combat-focused than most blue planeswalkers, and they allow for some fun bounce synergies that appear to be present in Kaldheim
Combined with the aforementioned lifelink, we can spin up our life total relatively quickly