end the turn mtg card When does 'until your next step' end in Magic: Gathering? triggered ability Turn structure - MTG Wiki

The bell is absolutely massive and it jingles and brings joy, so it belongs on this list of festive MTG cards

Senus return to combat when a legend attacks isnt even that exciting

With Defend the Rider, not only can you protect a key permanent, but you can also make a Pilot and crew a vehicle at instant speed

The best aspect of this creature is that you can grab cards from opponents graveyard, so getting a good enters creature like Ravenous Chupacabra or a creature that makes many tokens is very interesting

As for the deck itself, adding cards that reduce the cost of casting spells is always a good idea, and a lot of them like Jaces Sanctum come with an upside that might synergize well with the deck