mtg innistrad crimson vow cards Innistrad: Draft Booster Box you lose life equal to its mana value.2 Magic The Gathering - Innistrad

Hydroelectric Laboratory is far less situational, and can still offer your deck a bit of fluidity which isn't too wierd

Here's the release schedule

2 Matoya, Archon Elder Is A New Staple For Blue Players Boosting Your Scrying Abilities To Even Greater Heights At first glance, a card like Matoya, Archon Elder isn't as exciting as some flashier options out there, but Matoya has astounding potential to become a staple in just about any Blue deck

no, BI isn't actually 1 mana, even if it feels that way most of the time

Leonin Warleader is also a nice addition to lifegain decks, not only because its tokens have lifelink, but getting two extra bodies each turn triggers things like Soul Warden