Method mergeTo

forge-game/src/main/java/forge/game/cost/Cost.java:966–978

(Cost source, int amt, final SpellAbility sa)

    }

    public void mergeTo(Cost source, int amt, final SpellAbility sa) {
        // multiply to create the full cost
        if (amt > 1) {
            // to double itself we need to work on a copy
            Cost sourceCpy = source.copy();
            for (int i = 1; i < amt; ++i) {
                // in theory setAmount could be used instead but it depends on the cost complexity (probably not worth trying to determine that first)
                source.add(sourceCpy);
            }
        }
        // combine costs (these shouldn't mix together)
        this.add(source, false, sa);
    }

    public Cost add(Cost cost1) {
        return add(cost1, true);