So was messing around with Temur Reclamation and saw a card that I thought would fit well in the Arclight Phoenix instant/sorcery shell in a mirror matchup.

Really just the addition of Saheeli, Sublime Artificer and Karn, Scion of Urza and Narset, Parter of Veils in the SB versus control. It's a beast against control as well. Could be main board if it wasn't so slow in a deck that wants to be moderately fast. I also have Ral, Storm Conduit in the SB. Too slow for a t4. Could test replacing Karn with him.

But I really like Karn as another draw engine/win con.

You've got your normal discard, draw, damage into recurring Arclight Phoenix out of the grave. But you also can play Saheeli, Sublime Artificer and all your instants and sorceries create a 1/1 artifact critter. Then if you drop Karn, you can -2 him and create a pretty big critter, then -2 Saheeli to copy that big critter for a couple turns.

Not sure about the SB. Any tips there would be helpful.

2 x Karn, Scion of Urza (DAR) 1
7 x Island (RIX) 193
3 x Saheeli, Sublime Artificer (WAR) 234
4 x Arclight Phoenix (GRN) 91
6 x Mountain (RIX) 195
3 x Opt (XLN) 65
1 x Opt (DAR) 60
4 x Radical Idea (GRN) 52
4 x Shock (M19) 156
4 x Chart a Course (XLN) 48
4 x Tormenting Voice (M19) 164
3 x Lightning Strike (XLN) 149
2 x Ral, Izzet Viceroy (GRN) 195
4 x Steam Vents (GRN) 257
4 x Sulfur Falls (DAR) 247
3 x Lava Coil (GRN) 108
2 x Shivan Fire (DAR) 142

2 x Ral's Outburst (WAR) 212
2 x Ionize (GRN) 179
2 x Fiery Cannonade (XLN) 143
3 x Narset, Parter of Veils (WAR) 61
2 x Negate (RIX) 44
2 x Ral, Storm Conduit (WAR) 211
2 x Disdainful Stroke (GRN) 37