Or just play the land tapped in the early game, hopefully with nice bounce land synergies
For example, if an opponent lost 4 life and gained 6 life during the turn, that player will have a higher life total than they started the turn withbut Bloodchief Ascension's first ability will still trigger
In terms of individual cards, Beseech the Mirror and Agatha's Soul Cauldron are both very powerful with potential multi-format implications
Costing seven ink to play, Milo Thatch, King of Atlantis, is an emerald card worth having thanks to its Take Them by Surprise ability - which returns all opposing characters to their players hands when this card is banished
Whenever equipped creature deals combat damage to a player, that player discards a card and you untap all lands you control
A 7/7 Eldrazi for 7 mana with seven keyword abilities is nice, and Sire of Seven Deaths can be played in Eldrazi decks, or keyword soup decks