Ray of Erasure Mill per Card: 1 (infinite) Mill per Mana: 1 This is probably too slow and weak to run but it is playable filler being both a one drop and a cantrip card
Then, you can use the second ability if things get out of control
Ajani Fells the Godsire Ajani Goldmane Ajani Steadfast Ajani Unyielding Ajani Vengeant Ajani's Aid Ajani's Chosen Ajani's Comrade Ajani's Influence Ajani's Last Stand Ajani's Mantra Ajani's Presence Ajani's Pridemate Ajani's Response Ajani's Sunstriker Ajani's Welcome Ajani, Adversary of Tyrants Ajani, Caller of the Pride Ajani, Inspiring Leader Ajani, Mentor of Heroes Ajani, Nacatl Avenger Ajani, Nacatl Pariah Ajani, Outland Chaperone Ajani, Sleeper Agent Ajani, Strength of the Pride Ajani, Valiant Protector Ajani, Wise Counselor Ajani, the Greathearted Essence of Ajani (playtest) Oath of Ajani Qala, Ajani's Pridemate
The set symbol tells you where it's from
But when a set comes out with this many legends, some of them are bound to be non-rares