The cumulative upkeep trigger doesn't target what you gain control of, and you don't choose lands until the ability resolves. Your opponents can not tap lands in response to the choice, but they could respond to the ability by tapping any number of lands before you've made any choices.
When Herald of Leshrac's cumulative upkeep ability resolves, if its age counters outnumber the number of lands on the battlefield that you don't control, you can't pay its cumulative upkeep cost and must sacrifice it.
Herald of Leshrac's leaves-the-battlefield ability affects all lands you control but don't own, not just the ones you gained control of with Herald of Leshrac. For example, if you had gained control of an opponent's land with Annex, its owner will regain control of that land. Annex will remain attached to it, but its effect will be overridden.
Last observed on Scryfall 2 months ago at $4.15. Over the trailing 90 days the price moved between $0.68 and $4.15 across 44 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 2 catalogued treatments from PLST — the lineup includes Foil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #CSP-62 of *The List*, the set that shipped alongside the March 2020 The List release.
Card type: Creature — Avatar, color identity black, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters. Mana cost: {6}{B} (7 converted). Keyword abilities: Cumulative upkeep and Flying.
Legal in Modern, Legacy, Vintage, and Commander.
EDHrec ranks this card #11,040 in Commander, putting it in the fringe-play tier of the format's playable pool.
Illustrated by Alex Horley-Orlandelli. Rarix catalogs 409 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Alex Horley-Orlandelli
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
You must choose a different land you don't control for each age counter on Herald of Leshrac. Otherwise, you'd try to gain control of a land you *do* control midway through paying the cost and need to back up.
