The Millennium Calendar [The Lost Caverns of Ixalan] Core Set 2021 Tokens put a number of charge

put a number of charge counters on Geometric Nexus equal to that spell's mana value

except it's a Tyranid in addition to its other types

Set: The Lord of the Rings: Tales of Middle-Earth Showcase Scrolls Type: Creature — Spider Rarity: Common Cost: {G} Deathtouch

flip Nezumi Graverobber

The Millennium Calendar [The Lost Caverns of Ixalan] Core Set 2021 Tokens put a number of chargeSet: The Lost Caverns of Ixalan Type: Legendary Artifact Rarity: Mythic Cost: {1} Whenever you untap one or more permanents during your untap step, put that many time counters on The Millennium Calendar. {2}, {T}: Double the number of time counters on The Millennium Calendar. When there are 1,000 or more time counters on The Millennium Calendar, sacrifice it and each opponent loses 1,000 life.