Consider running Metamorphosis in your graveyard or sacrifice deck to generate big mana, Im sure Meren of Clan Nel Toth and Henzie Toolbox Torre wont mind
7 Dingirsu, The Orcust Of The Evening Star Dingirsu, the Orcust of the Evening Star is a fantastic Boss Monster, and the reason Orcust decks are as good as they are
6 Abaddon The Despoiler Straight from the Warhammer 40,000 Commander decks, Abaddon the Despoiler doesnt have cascade itself, but its Mark of Chaos Ascendant ability instead gives all spells in your hand cascade so long as their casting cost is less than or equal to the amount of life all your opponents have lost this turn
(Put X +1/+1 counters on an Army you control
Ultros, Obnoxious Octopus Rarity: Uncommon TYPE: Legendary Creature SUBTYPE: Octopus CMC: 2 Mana cost: USD: $0.19 EUR: 0.08 TIX: 0.03 EDHREC RANK: 14735 (2/1) Whenever you cast a noncreature spell, if at least four mana was spent to cast it, tap target creature an opponent controls and put a stun counter on it