Prehcise: many interesting suggestions here.

I like harmonize, abundance, the walls, yavimaya elder and fertile ground. Of the removal you mentioned i mostly have better versions in here, e.g. vraska's contempt > hero's downfall. I do have putrefy in the side, oblivion ring isn't too great as it can't be used more than once with seasons past, and i definitely won't play beast within when i have access to black and white. Tyrant, gearhulk and titan are indeed very cool, but overcosted for what they bring to the deck. I still put them to maybe in case i can get them cheap-ish. Tooth and nail would need a totally different deck.

Thoughts on Veteran Explorer?

I don't think I would use Veteran Explorer unless you're playing in a free-for-all or something. One on one, depending on the deck it could help accelerate the other deck more than yours, plus they could just kill it at the end of your turn to benefit them on the next one.

Cheers!

I like this deck alot! It's inspiring. I'm going to put together something like this...

Two suggestions: Engineered Explosives, Endless One

Juha: Great you like it. I'm in on explosives, it's pretty fitting, though a little (huh huh) expensive. Would Ratchet Bomb would be an alternative? Endless isn't that great here since he can be killed that easily.

Thanks a lot for the comment. If you get to build your own version, I'd love to have a look at it.

The idea was that they both have CMC 0, so they fit in nicely with Seasons Past. Maybbe we all need to wait on a reprint on Engineered Explosives :|

Juha: shame on me. I kept on reminding everyone commenting here of the cmc thing on seasons past, and the first time somebody easily grasps it, I don't get it. Result is still the same though: yes but expensive to explosives, no to endless because he dies to removal ;D

Reprint would be awesome btw. Any ideas for a hypothetical sideboard maybe?