mtg card sigarda's aid price increase FOIL Proxy Playtest with Custom Fantasy Art You may look at the top card of your library any time Sigarda's Aid (SLD-731) - Secret

I think theres a good case to be made for Heritage Druid being the guilty party, but the reason I still think its Glimpse of Natures fault is how there are fifteen other mana creatures that could be a part of a busted Glimpse of Nature deck, while Glimpse of Nature and Skullclamp are basically the only two cards that have made Elves degenerate (and I guess maybe Gaeas Cradle, if were being very generous)

I always try to find ways to give it to all my creatures or spells

Four cards that I included arent legal for Arena, though: Nature's Lore, Kodama's Reach, Oran-Rief, the Vastwood, and Thrumming Stone

This is easy enough to do, considering any self-respecting proliferate deck will have tons of permanents that enter with counters on them already

(In case you havent seen it in action, turning an attacking creature into a vehicle removes it from combat, even if there are enough other creatures to immediately crew it again)