Its activated abilities cant be activated this turn
(9/20/2024) If a face-down spell leaves the stack and goes to any zone other than the battlefield (if it was countered, for example), you must reveal it
Rather, it causes basic lands you tap for mana to produce more mana
Ultimately, players will have to playtest the cards themselves to see if Galadriel can keep up with today's power levels in Modern and Commander, but it doesn't look likely
A battle can be dealt damage and be target of spells and/or abilities that target "any target." Damage dealt to a battle causes that many defense counters to be removed from it
Eradicator Valkyrie is untouchable by planeswalker abilities, and in the right deck, its boast ability will help get walkers off the table