Mana Flare From old core sets, would be a reasonable rare
The included cards, hailing from a variety of historic expansions, appear below alongside how likely they are to be discovered in their respective slots: Imposter of the Sixth Pride (50%), Enduring Sliver (50%), Sentinel Sliver (50%) Irregular Cohort (100%) King of the Pride (50%), Dregscape Sliver (25%), Throatseeker (25%) Graveshifter (100%) Venomous Changeling (50%), Faceless Agent (50%) Changeling Outcast (75%), Universal Automation (25%) Etchings of the Chosen (100%) Thwart the Grave (50%), Allied Assault (25%), Birthing Boughs (25%) Davriel's Withering (67%), Dire Fleet Poisoner (33%) Blade Splicer (100%) Deadly Alliance (50%), Journey to Oblivion (50%) Cycling Land (100%) Historic Horizons is the follow-up to the popular Jumpstart set released for Magic: The Gathering Arena in 2020

Those decks often set up for many turns by simply ramping more lands into play, and Iridescent Vinelasher is both an alternate win-con and an easy way to set up the magic number of 18 life that Valakut needs to combo kill a player in Modern
Merfolk Branchwalker Merfolk Branchwalker is one of the finer 2-drops with explore
He's now impossible to ignore and very much a topic in most art schools on entering the workforce