Enchantment - Saga Tornado Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) , Pay 3 life for each velocity counter on this enchantment: Destroy target permanent and put a velocity counter on this enchantment
It would rate around the middle of this list, if the cards weren't about to rotate out of Core constructed
Playing with Power MTG features gameplay and deck discussion
With cards like Druid Class or Budoka Gardener, you can quickly put those two lands back onto the battlefield, potentially triggering any landfall shenanigans you may also have going on
#6 Mask of Memory Mask of Memory is a sometimes underrated performer in creature-based decks
It's an enchantment with the now little-used 'world' subtype, which simply indicates it affects all players and must be sacrificed if another world enchantment enters