Its worth noting that this mechanic is restricted to once per opponents turn, meaning it gets better in multiplayer Magic and your opponents know the maximum amount of value you can accrue
Lets start with increasing the combat damage
No one is quite sure how that happened, but you could get a 3/3 for three mana with a minimal drawback and the ability to hide from removal
EDHREC uses its own database of card information, pulls card data from ScryFall (art, card stats, and mechanics) and Commander Spellbook (for combos), and pulls decklists from Archidekt, Moxfield, and Scryfall
As an example, the series-staple S.P.E.C.I.A.L bobbleheads make their cardboard debut as artifacts - with the Perception Bobblehead being the only one shown so far - along with the T-45 Power Armor that you can equip on one of your creatures - granting increased strength that would make even the Paladins of the Brotherhood of Steel blush