Kasla, the Broken Halo is a Legendary Creature — Angel Ally (mana cost {3}{U}{R}{W}; 5/4; rarity: mythic; most recent printing listed by Scr...
Kasla, the Broken Halo is a Legendary Creature — Angel Ally (mana cost {3}{U}{R}{W}; 5/4; rarity: mythic; most recent printing listed by Scryfall: March of the Machine Commander) and the face commander of the Divine Convocation precon. Its text:
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Flying, vigilance, haste
Whenever you cast another spell that has convoke, scry 2, then draw a card.
An upgrade guide should never invent a decklist, so this one works by role: what the commander's text rewards, which roles in a stock list usually underperform, and which roles to strengthen — with real, checkable cards named for the add slots.
What to cut, by role
Cut by role, not by name. The first cuts in most precons are the highest-cost cards that do not connect to the commander's text — expensive spells that belong to a different deck's plan. Next are the redundant pieces: the third and fourth copy of an effect the deck already has at two, in colours the mana base casts awkwardly. Finally, cut the win-more cards: anything that only matters when you are already far ahead is a slot a role-player needs more.
What to add, by role
Add interaction and card flow before adding power. The two named adds below are real cards whose text serves this commander directly — check both in the MTGBrew card database:
Elspeth, Sun's Champion — Legendary Planeswalker — Elspeth (mana cost {4}{W}{W}): +1: Create three 1/1 white Soldier creature tokens.
−3: Destroy all creatures with power 4 or greater.
−7: You get an emblem with "Creatures you control get +2/+2 and have flying."
Assemble the Legion — Enchantment (mana cost {3}{R}{W}): At the beginning of your upkeep, put a muster counter on this enchantment. Then create a 1/1 red and white Soldier creature token with haste for each muster counter on this enchantment.
Beyond the named adds, strengthen the roles in this order: ramp that arrives before the commander, removal that answers any permanent type your colours struggle with, and draw attached to things the deck already does. Build the upgraded list in the MTGBrew AI deck builder, where the budget you set is a hard rule the brew never exceeds.
If this topic is on your bench, keep going with Meren of Clan Nel Toth Commander Guide: How the Deck Actually Wins — it covers the neighbouring decisions from a different angle, and the two pieces together give you a fuller picture than either one alone.
The upgrade philosophy
A precon upgrade is finished when the deck does its commander's thing every game, not when it contains the most famous cards. Make a handful of role-based changes, play the deck, and let real games nominate the next round of cuts.
Keep reading
Keep reading: Meren of Clan Nel Toth Commander Guide: How the Deck Actually Wins and Enlightened Tutor in Commander: What It Does and Which Decks Want It.
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