mtg six card (Retro Frame) #430 - Modern Horizons 3 (You may cast instant and sorcery cards from your graveyard by discarding a land card in addition to paying their other costs.) Art by Chase Stone Six (Commander) | EDHREC

This card is going to be huge in Commander for decks with access to white mana, because what do you mean your spells gain Flash just because someone else cast a spell

Kellan, Daring Traveler Kellan, Daring Traveler seems good enough, following the Regal Bunnicorn here into Wonderland, and I think this has to be an immediately powerful card in the Selesnya humans deck in Standard WotC keeps wanting us to finally figure out how to build

I dont know if a blink deck needs every effect like this, but I wouldnt be surprised to see one or two of these make a Commander flicker deck

Remove the creature and Basilisk Collar will stay, ready to re-equip to something else and continue its reign of terror

[15] 1/1 Bird creature with flying for Knight of Doves

This works quite well with Tegwyll, letting you draw a card whenever you sacrifice Glen Elendra Archmage to counter a spell