50% of the proceeds from the Secret Lair will be donated to Extra Life, to support children's hospitals - in particular the Seattle Children's Autism Center
The Dragon you fetch up goes into your graveyard, which is great for Bladewing, and while youre only meant to activate this once per turn, you can actually hold priority to do it twice for some fun combos like using Moltensteel Dragon to buff itself up and then becoming Skithiryx to deliver a fatal blow with ease
Opposition decks also value this guy highly as his otherwise pretty irrelevant body become useful even when you don't want to be discarding
Heroic Intervention Heroic Intervention has become a green staple in EDH, and it both protects your permanents from spot removal and from sweepers that destroy all cards
Seeing as youre playing Dinos, that will be most of them, so youre always going to be gaining three life and drawing a card when you play a creature, so long as this powerful card remains on the board
Normally, it feels like our lands are mostly safe with a few exceptions