And sure, there's a downside to using Ancient Tomb too many times, but decks running the land are either trying to end the game before the life loss catches up to them, or lock the opponent out in some way so their life total stays padded
But also, practically, you cant return an unblocked attacking creature to hand until you know whether its blocked , which requires the declare blockers step from your opponent
I used a few ideas from the cheap upgrades and added a few of my own
A Killer Among Us Abundant Countryside Adaptive Automaton Ageless Sentinels Alpha Status Amoeboid Changeling Amorphous Axe An-Zerrin Ruins And They Shall Know No Fear Aphetto Dredging Arachne, Psionic Weaver Arachnoform Arcane Adaptation Archon of Valor's Reach Artificial Evolution Ashes of the Fallen Atraxa, Grand Unifier Avian Changeling Azula, Cunning Usurper Banner of Kinship Baral and Kari Zev Barbarian Guides Barbflare Gremlin Barkform Harvester Basalt Ravager Belbe's Portal Belonging Birthing Boughs Black Market Connections Blades of Velis Vel Blood Oath Bloodline Bidding Bloodline Pretender Bloodline Shaman Boldwyr Intimidator Boseiju, Who Endures Braids, Arisen Nightmare Brass Herald Bucket List (playtest) Cactus Preserve Cairn Wanderer Call to the Kindred Caller of the Hunt Callous Oppressor Cavern of Souls Celestial Reunion Cemetery Gatekeeper Cemetery Illuminator Cemetery Protector Cemetery Prowler Chameleon Colossus Changeling Berserker Changeling Hero Changeling Outcast Changeling Sentinel Changeling Titan Changeling Wayfinder Chaotic Transformation Chitinous Graspling Chomping Changeling Chronicle of Victory Circle of Solace Cloud Key Coalition Flag Coalition Victory Coat of Arms Collective Inferno Confusion in the Ranks Conjurer's Mantle Conspiracy Contamination
Do note that, because of how rare these cards are, sales do not happen too often
