4: Creatures you control get +3/+3 and gain trample until end of turn
EDH Tribal Staples Creature (11) 1x Adaptive Automaton 1x Bloodline Shaman 1x Brass Herald 1x Caller of the Hunt 1x Elvish Soultiller 1x Metallic Mimic 1x Mirror Entity 1x Mistform Warchief 1x Riptide Chronologist 1x Riptide Shapeshifter 1x Tribal Forcemage Land (2) Enchantment (18) 1x Alpha Status 1x Call to the Kindred 1x Conspiracy 1x Cover of Darkness 1x Crown of Ascension 1x Crown of Awe 1x Crown of Fury 1x Crown of Suspicion 1x Crown of Vigor 1x Descendants' Path 1x Faces of the Past 1x Mana Echoes 1x Mirari's Wake 1x Reins of the Vinesteed 1x Steely Resolve 1x Xenograft Artifact (11) Instant (5) 1x Coordinated Barrage 1x Defensive Maneuvers 1x Luminescent Rain 1x Tribal Unity 1x Vigean Intuition Sorcery (5) Commander (1) Maybeboard Creature (6) 1x Bloodline Shaman 1x Chameleon Colossus 1x Mistform Wakecaster 1x Mistform Warchief 1x Riptide Shapeshifter 1x Taurean Mauler
It is a very odd mana rock, because you are spending mana to get 1 less than you spent, but I think the threat here is that it then also becomes an 8/8 that makes opponents start sacrificing permanents, which seems pretty strong, especially since it is safe from creature-based removal until you turn it on
There are ten mech lands, two for each basic land type: You can find the mech basic lands in traditional foil and non-foil in The Brothers' War Set and Draft Boosters
For example, "Aunt Cass, Biggest Fan", while not an Inventor, does work synergistically with them by giving one +1 lore whenever she quests
