cycling cards mtg A Brief History of Payoffs—Exclusive Ikoria Preview Cycling | Magic: The Gathering

you have plenty of options

Maverick Thopterist : Creature (Human Artificer), casting cost of three generic, one blue, and one red mana, 2/2

Artifact Familiars There are also tons of these and we ended at "F" with them

Spellbook is like Reliquary Tower in that it costs literally no mana to play, plus it is fetchable like Library of Leng with Trinket Mage

You can also easily blink it when its in creature form, bringing the enchantment side back to kill another target and give you more Treasure

In some respects we got this recently with Firesong and Sunspeaker, but I might contest they were closer to Balefire Liege than Soulfire Grand Master