Sacrifice decks especially like this, but any white deck can play it and just draw cards when creatures trade off in combat
Djeru reminds me of Thalias Lancers which is a card I am quite fond of as the limited search ability makes for interesting decisions on what to get when it hits the field
Based on the alien villain from Final Fantasy 7 , Jenova, Ancient Calamity is a 1/5 alien legendary creature that costs four mana (two colorless, one black, and one green) to play
The first Card, Hiram Flaversham, Toymaker was a staple in any Sapphire decks due to its ability to draw two cards by discarding an item
Given all that, why did speculators target this card this month
Cards like Michelangelo, Improviser use sneak to enter combat tapped and attacking, while spells such as Shredders Technique and The Last Ronins Technique can be deployed mid-combat for discounted costs, turning what looks like a safe block into a blowout