In most cases, the answer is no, which means free cards for you and a massive card gap by turn 4 or 5
Jan Jansen, Chaos Crafter Jan Jansen, Chaos Crafter can create two Treasures whenever you tap them to sacrifice an artifact creature
It protects your creatures from being countered and gives them haste or +1/+1 counters, all at 3cmc
Kefka, Court Mage // Kefka, Ruler of Ruin Rarity: Mythic Rare TYPE: Legendary Creature // Legendary Creature SUBTYPE: Human Wizard // Avatar Wizard CMC: 5 Mana cost: USD: $5.07 EUR: 5.42 TIX: 0.03 EDHREC RANK: 3169 (4/5) Whenever Kefka enters or attacks, each player discards a card
As we have seen with DRC, Delirium is not very difficult to get, especially in a format with Fetchlands and Mishras Bauble
This also means that infinite mana combos can be used to draw through your entire deck