Mechanically unique Secret Lair cards were always going to be a tough sell to the playerbase (even if, financially, The Walking Dead Secret Lair sold incredibly well), and this is a solution many people have already suggested
If this card is in your GY, except the turn it was sent there, and you control a Synchro Monster with "Warrior", "Synchron", or "Stardust" in its original name: You can Special Summon this card, but banish it when it leaves the field
Enchantment - Saga Saga (CTRL to add secondary) Sideboard Ajani Fells the Godsire (As this Saga enters and after your draw step, add a lore counter
Standard players gain aggressive tools like Slickshot Show-Off that enable explosive prowess turns
These increases make PSA grading prices worth paying for the right cards
For most constructed decks, around 22 to 26 lands is common, though ramp spells or artifact cards that produce mana can change that number