There's actually quite a bunch of them:
Quietus Spike + Goblin Sharpshooter1. Attach the Spike to the shooter.
2. Ping a creature. Deathtouch kills the creature, Sharpshooter untaps.
3. After killing all blockers, attack to halve opponent's life total.
Deathbringer Thoctar + Quietus SpikeSimilar to the previous combo; ping a creature, kill it, get a +1/+1 counter, ping another creature.
Freed from the Real + Bloom Tender1. Attach FFTR to the Bloom Tender
2. Tap the Bloom Tender for
3.
: Untap Bloom Tender. Infinite
.
Umbral Mantle + Viridian Joiner1. Attach the Umbral Mantle to the Viridian Joiner
2. Tap for
, pay 2 more to untap and +2/+2
3. Tap for
, untap for +2/+2
4. Continue producing infinite
and size
Valaklut, the Molten Pinnacle + Prismatic OmenAll lands including Valaklut are Mountains, so triggers more easily. Can also be used with
Emeria, the Sky Ruin Niv-Mizzet, the Firemind + Ophidian EyeAhh, everybody loves a classic:
1. Attach Ophidian Eye to Niv-Mizzet
2. Tap to draw a card, or draw a card any other way to ping an opponent
3. Ophidian Eye draws you a card, pinging an opponent again, drawing another card etc...
I'll keep posting, although more for a deck construction brainstorm post.