They provide mild roadblocks for aggro decks, can usually stop one attacker but not a whole swarm, and always net the caster some value, so that they're worthy of maindeck inclusion
Elvish Warmaster can grant Deathtouch, something that will make your opponent think twice before blocking (even if you decided not to pay the mana)
Her I Trust You ability lets a player look at the top two cards of a deck and take one into their hand every time she quests, generating plenty of card draw and making it easier to get a specific target
creatures you control get +1/+1 until end of turn
Transcendence Transcendence is a weird card that mitigates the damage that would make you lose the game by letting you gain life as you lose it
Thickness of 1 Side (microns): Ultimate Guard Katana Inner (40), Ultimate Guard Cortex (105) 100 Double Sleeved Card Thickness (mm): Theoretical (59), Practical (65) Water Test: Pass Deck Box Fit (mm storage): Fit: 72 good, 28 bad