Avalanche (8)
Sacrifice a land: Akki Avalanchers gets +2/+0 until end of turn. Activate only once each turn.
Destroy X target snow lands.
: Target snow land you control becomes a 4/4 Elemental creature with hexproof and haste until end of turn. It's still a land. (A creature with hexproof can't be the target of spells or abilities your opponents control.)
Haste
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When Avalanche Riders enters, destroy target land.
Whenever Avalanche Tusker attacks, target creature defending player controls blocks it this combat if able.
Lavalanche deals X damage to target player or planeswalker and each creature that player or that planeswalker's controller controls.
Pinpoint Avalanche deals 4 damage to target creature. The damage can't be prevented.
The next spell you cast this turn can be cast as though it had flash. When you next cast a spell this turn, put X +1/+1 counters on up to one target creature, where X is the mana value of that spell.
Gatherer works better in the Companion app!
(At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)