Alrund gets +1/+1 for each card in your hand and each foretold card you own in exile. At the beginning of your end step, choose a card type, then reveal the top two cards of your library. Put all cards of the chosen type revealed this way into your hand and the rest on the bottom of your library in any order.
Other tapped creatures you control get +1/+0. Other untapped creatures you control get +0/+1. Whenever you attack, untap each creature you control, then tap any number of creatures you control.
As an additional cost to cast this spell, you may sacrifice any number of creatures. This spell costs {2} less to cast for each creature sacrificed this way. Each opponent sacrifices a creature. Create a 3/6 black and red Avatar creature token with haste and "Whenever this creature attacks, it deals 3 damage to each opponent."
Whenever you cast a spell, add {R}. Until end of turn, you don't lose this mana as steps and phases end. Creatures you control can boast twice during each of your turns rather than once.
At the beginning of your upkeep, you may exile Cosima. If you do, it gains "Whenever a land enters the battlefield under your control, if Cosima is exiled, you may put a voyage counter on it. If you don't, return Cosima to the battlefield with X +1/+1 counters on it and draw X cards, where X is the number of voyage counters on it."