Blocks were eventually shelved after Wizards realized the Two-Block Paradigm was problematic for a lot of reasons, mainly because of a lack of reprints and issues with developing sets
If the rest of the bonus sheet is like this, it will provide needed reprints without unbalancing draft and sealed games with extra bomb rares
If an effect of a Fairy monster you control is activated (except during the Damage Step): You can Special Summon this card from your hand
Sets like 151 catered to nostalgia, while Paradox Rift and Twilight Masquerade pushed competitive mechanics
That way its skill testing for me, too I get to choose how and when to use my limited suite of reactionary spells, and not rely on the crutch of tutorable Teferis Protection
While fast lands are great in quick competitive formats, Id give the edge to Triomes in longer formats