Like normal sagas, these gain lore counters that trigger the next effect in a sequence, and like normal sagas they are sacrificed after the last counter is placed
If it had either one of its two abilities, it would still be a powerful force, but when you consider both on the same two-drop, youre talking about consistently adding +5/+5 to +7/+7 to the table for just two mana
If they're attached to creatures, they can be recurred by Eternal Witness and other Green return-permanent-from-the-graveyard cards
It's no coincidence that the two best decks from the First Chapter format each feature one of these cards
The Torment of Gollum The Torment of Gollum is my most drafted common for this set by a pretty large margin
For those of you who want to know just how good delve will be, take a moment and think back to how many different Phyrexian mana spells have seen play in Legacy over the years