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A mana base can be simple (say, seventeen Plains in an all-white, 40-card deck) or it can be quite complex: featuring multiple colors of mana, lands with unusual abilities, and indirect methods of making mana (via artifacts, creatures, or spells)
Plus, those animated permanents draw you cards when they connect in combat, turning utility pieces into threats that stick around
On my turn, I cracked the fetchland for a Mystic Sanctuary to put another Swords to Plowshares from my graveyard onto the top of my library, then cast the Dress Down to draw into it and Swords to Plowshares both of my opponents creatures
Giving a nifty ward boost to your other legendary creatures is a fun add-on, but its K-9s activated ability that truly un leashes this Robot Dog, as sometimes unblockability on another legendary creature can lead to a surprise win if foes arent expecting it