Blossoming Tortoise
Creature — Turtle
Whenever this creature enters or attacks, mill three cards, then return a land card from your graveyard to the battlefield tapped.
Activated abilities of lands you control cost 
less to activate.
Land creatures you control get +1/+1.
Simon Dominic
Wilds of Eldraine (WOE)
• #163Rulings
Blossoming Tortoise's second ability affects only abilities of lands you control on the battlefield. The costs of activated abilities of land cards that work in other zones (such as cycling) won't be reduced.
(wotc • 2023-09-01)
Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keyword abilities are activated abilities and will have colons in their reminder text. Triggered abilities (starting with "when," "whenever," or "at") are unaffected by the cost reduction ability of Blossoming Tortoise.
(wotc • 2023-09-01)
Rulings
Blossoming Tortoise's second ability affects only abilities of lands you control on the battlefield. The costs of activated abilities of land cards that work in other zones (such as cycling) won't be reduced.
(wotc • 2023-09-01)
Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keyword abilities are activated abilities and will have colons in their reminder text. Triggered abilities (starting with "when," "whenever," or "at") are unaffected by the cost reduction ability of Blossoming Tortoise.
(wotc • 2023-09-01)