first, "Dimension Sphinx", which inflicts the difference between the ATK of their monsters to Diva, second, "Dimension Guardian", which prevents "Lord Gaia" from being destroyed, and finally, "Dimension Mirage", which forces "Indiora" to attack again if it failed to destroy a monster in battle
Accumulate Wisdom allows you to draw three cards for just 2 mana, if you have three or more lessons in your graveyard, so its an interesting payoff for a spellslinger deck filled with lessons
It also does make interactions a bit funnier, honestly
Introduces 10 new Mega Evolution Pokemon-ex cards, adding strategic depth to gameplay
151 remains a very solid set thanks to both its SIRs and nostalgia, which also makes it one of the best Pokmon booster packs for collectors and new players