Historic rewards you for playing artifacts (which tend to be overcosted to compensate for their flexible mana costs), Sagas (which tend be good but fluctuate wildly in power level), and legendaries (which tend to be the most powerful creatures in the format, and also planeswalkers)
Card Text 2 [Security Effect] [Security] You may play 1 card with [Marcus Damon] or [Rhythm] in its name from your hand or trash without paying the cost
The 30 recoil damage is negligible, since Garchomp C Lv.X can heal it off with its Healing Breath PokePower
Look at your Deck, and if you do, you can add 1 monster from your Deck to your hand, whose sum of ATK and DEF equals your LP
These involve those stunning full-art cards you might have had the luck of opening, and reap some relatively good rewards if youre able to complete them
However, these decks have a phenomenal piece of utility to work around retreat locking, which is especially important in the current meta