pokemon triumphant booster pack TCG Pocket Light Expansion Appears New Trainer Pokémon TCG: HeartGold & SoulSilver:

It worked more intuitively and lessened weird interactions in mirror matches

Ocelot Pride + Guide of Souls Maybe a little weird to lump these two together, but Guide of Souls and Ocelot Pride show up in the same decks at an alarming rate

This is easier to pull off against a smaller number of opponents, although engine-based decks with token generation and such can try to set it up to kill several opponents

If you manage to do every kind of bending in a turn (or cheat with Moonmist) you'll be able to play your whole hand with the massive cost reduction, then flip back next turn and trigger four powerful effects

This has singlehandedly caused one old MTG card to see an absolutely ludicrous financial increase