mtg booster box lord of the rings Tales of Middle-Earth Pack Bundle Card database may be found here The Lord of the Rings:

Then Magic Academy events at your local game store are perfect for you

There is an argument to be made about the Final Aeon possession also being part of this mechanic, but I am not really so sure

But thats Magic cards for you

These cards reflect the ability to transform certain creatures and characters into alternate forms by fulfilling the required conditions

(2025-06-06) If an effect allows you to cast a spell with tiered "without paying its mana cost," you must still choose exactly one mode and pay the associated additional cost

Suddenly, all of your creatures with +1/+1 counters can convert their power into Izzet-colored mana