You can only control 1 "Demon Eyes Guardian" .Once per turn, if this card would be destroyed by battle or card effect, it is not
Tri-Brigade Shuraig the Ominous Omen in particular is very dangerous, as it banishes a card of its choosing as soon as it is Link Summoned, and it has its own floating effect that lets you add a monster to the hand if this card is sent to the Graveyard
Livio, Oathsworn Sentinel offers a different approach by allowing you to effectively bank them instead, then return everything youve banked to the battlefield for the low price of 3 mana
If a Synchro Monster in your possession whose original Level is 5 is destroyed by battle or an opponent's card effect while this card is in the GY: You can banish 1 other Zombie monster from your GY, and if you do, Special Summon this card
Because so few regenerate cards are still competitive, buying old booster backs to get them is a waste of time and money
The rest of the reprints in the deck are mostly bulk, but this is a solid value floor on which the new cards can build.