Against the blue decks you generally want to save it for their end step, against the aggro decks you want to combat step it, while against the midrange decks its often best used in the upkeep just to tap down lands (Tron literally cant interact at anything other than Sorcery speed)
The attack and sacrifice triggers often are fine at their lowest power level with say a 1/1 token, but the power gets jacked way up when you have cards with more power than their mana value like Anticausal Vestige
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Additionally, if she Banishes a character through a challenge, shell get to deal 2 damage to any other character
Read more about Kamiz: "Episode 5: Hymn of the Angels" "What You Expect to See" Anhelo, the Painter Anhelo is a historian and a businessman all in one