This is often an Aura or Enchantment, but many instants can give deathtouch for a single turn as a combat trick
Activate only as a sorcery. Only being able to activate this as a sorcery means itll have to be on your turn, but all you need to do is find a way to drain your own life and you can save a lot of mana with ease
If you plan your turn well (considering you're playing with 3 other players), you can exile 3 enemy cards and create 3 treasure tokens, as long as you deal damage to each opponent
Back when these were first printed they were literally the fifth best cycle of dual lands with them predating quick, check, filter, scry lands, dual man lands, shadow lands, battle lands, life lands, vivid lands, shard and wedge lands and the bicycling lands
Thassas Oracle Lab Maniac created a cool new ability