Cards like Sheoldred, the Apocalypse, Kambal, Consul of Allocation, and Sanguine Bond all fit in here quite well and make for a fun strategy that sees your opponents life go down just about as fast as yours skyrockets
To address the potential abuse, Time Vault was errataed to need time counters, similar to Magosi, the Waterveil
you want to be using an Equip 0 from Puresteel Paladin or another modifier, and then you want to be doing big damage, before using it for the mana ramping mode
It has "Whenever this creature deals damage to a player, that player gets a poison counter." (A player with ten or more poison counters loses the game.) See more Add To Wishlist Restock Notice Gatherer & Rulings (opens in new tab) NM EX VG G $19.99 Out of stock
If you want to dabble into five colors, however, I would recommend those two
Flash in Restoration Angel, flicker the creature, and now it's safe again