Rings of Brighthearth is a perfectly decent card on its own, allowing decks with excess mana to capitalize on valuable activated abilities
Tapestry Warden Tapestry Warden is a solid 3/4 with vigilance that flips the usual combat rules on their head
The text on all 10 IKO Companions reads: If this card is your chosen companion, you may cast it once from outside the game. Despite the restrictions placed on Companions, Magic players are already speculating on which of the 10 found in IKO will get banned next
And a 2/5 for 3 mana is a good defender, not to mention that it has dinosaur synergies
I love the card, but a 3-drop in Legacy needs to be a lot better
You could obviously replace all your Evolving Wilds with Escape Tunnels, since it's a strict upgrade, but don't overstate the upside on Tunnel either